One who prays witr with five or three does not sit or say the salam except at the end of them

Hisham bin Urwah narrates from his father that Aishah (may Allah be pleased with her) said: His (peace and blessings be upon him) prayer at night was thirteen rak'ahs. He (peace and blessings be upon him) would pray five rak'ahs of witr without saying the salam in them; then he would sit in the last rak'ah and say the salam.

Hisham bin Urwah narrates from his father that Sayyidah Aishah (may Allah be pleased with her) said: The Messenger of Allah (peace and blessings be upon him) used to pray thirteen rak'ahs, five of which were witr. The Prophet (peace and blessings be upon him) would not sit during those five, and he would say the salam in the last rak'ah.
(b) In the narration of Abu Bakr: The night prayer of the Prophet (peace and blessings be upon him) was thirteen rak'ahs, five of which were witr, and he would sit only in the last rak'ah.

Sayyidah Aishah (may Allah be pleased with her) said that the Prophet (peace and blessings be upon him) would sleep; when he woke up, he would use the tooth-stick (miswak) and perform ablution (wudu). Then he would pray eight rak'ahs, sitting after every two rak'ahs and saying the salam. Then he would pray five rak'ahs, sitting only in the fifth rak'ah and saying the salam only in the fifth rak'ah.
(b) In the narration of Muhammad bin Ja'far bin al-Zubayr the wording is that he (peace and blessings be upon him) would pray six rak'ahs, two at a time.

Urwah bin al-Zubayr (may Allah have mercy on him) narrates from Sayyidah Aishah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) used to pray thirteen rak'ahs: two rak'ahs before the Fajr prayer, six rak'ahs two by two, and five witr; he did not sit between them, sitting only in the last rak'ah.

Sa'd bin Hisham narrates from Sayyidah Aishah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) used to pray three witr and sat only in the last rak'ah.
(b) Sa'd bin Hisham narrates concerning the witr of the Prophet (peace and blessings be upon him) that he (peace and blessings be upon him) prayed nine, and sometimes also seven, witr.

Abdullah bin Abi Qays says: I said to Sayyidah Aishah (may Allah be pleased with her): How many (rak'ahs) was the witr of the Prophet (peace and blessings be upon him)? She said: He (peace and blessings be upon him) prayed four and three, six and three, eight and three, ten and three, and he did not pray fewer than seven witr, nor more than thirteen. Ahmad (may Allah have mercy on him) added: He (peace and blessings be upon him) did not pray witr with the two rak'ahs of Fajr. I said: How was his (peace and blessings be upon him) witr? She said: He (peace and blessings be upon him) never left it. Ahmad (may Allah have mercy on him) did not mention the words "six and three". It is possible that what is meant is that he (peace and blessings be upon him) prayed three witr, neither sitting nor saying the salam in between, so it would carry the meaning of the narration of Hisham bin Urwah (may Allah have mercy on him).
(b) A narration with the same meaning as the narration of Hisham bin Urwah (may Allah have mercy on him) about five rak'ahs of witr has also been reported from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) from the Prophet (peace and blessings be upon him).

Sa'id bin Jubayr (may Allah have mercy on him) narrates from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that he said: I spent the night in the house of my maternal aunt, Sayyidah Maymunah (may Allah be pleased with her). The Prophet (peace and blessings be upon him) prayed the Isha prayer, and after it he offered four rak'ahs. Then he slept, then he got up. Sayyiduna Ibn Abbas (may Allah be pleased with them both) says: I stood on his (peace and blessings be upon him) left side, and he (peace and blessings be upon him) moved me to his right side and prayed five rak'ahs, then he offered a prayer of two rak'ahs, then he slept, until I heard the sound of his (peace and blessings be upon him) snoring; then he (peace and blessings be upon him) went out to the prayer.

Sa'id bin Jubayr narrates from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that Sayyiduna al-Abbas bin Abd al-Muttalib (may Allah be pleased with him) sent him to the Prophet (peace and blessings be upon him) on some errand. That day was the turn of Sayyidah Maymunah (may Allah be pleased with her), the maternal aunt of Sayyiduna Ibn Abbas (may Allah be pleased with them both). He went to her, and the Prophet (peace and blessings be upon him) was in the mosque at that time. Sayyiduna Ibn Abbas (may Allah be pleased with them both) says: I lay down in the apartment of the Prophet (peace and blessings be upon him). I was saying to myself that today I would count how much the Prophet (peace and blessings be upon him) prays. He (peace and blessings be upon him) came after a third of the night had passed, while I was lying in his (peace and blessings be upon him) apartment. Then he said: "Go to sleep." He (peace and blessings be upon him) took a sheet from Sayyidah Maymunah (may Allah be pleased with her); part of it was over the Prophet (peace and blessings be upon him) and part of it was over Sayyidah Maymunah (may Allah be pleased with her). Then he (peace and blessings be upon him) stood and prayed two rak'ahs at a time until he had offered eight rak'ahs. Then he (peace and blessings be upon him) prayed five witr and did not sit in between. Then he (peace and blessings be upon him) sat and praised Allah as He deserves. He (peace and blessings be upon him) praised Him abundantly, and at the end he said these words: 'Allahumma ij'al li nuran fi qalbi, waj'al li nuran fi sam'i, waj'al li nuran fi basari, waj'al li nuran 'an yamini, wa nuran 'an shimali, waj'al li nuran bayna yadayya, wa nuran khalfi, wa zidni nuran, wa zidni nuran' (O Allah, place light for me in my heart, place light for me in my hearing, place light for me in my sight, place light for me on my right and light on my left, place light for me in front of me and light behind me, and increase me in light, increase me in light).

Isma'il bin Zayd bin Thabit (may Allah have mercy on him) relates that Sayyiduna Zayd (may Allah be pleased with him) used to pray five witr and said the salam only in the last rak'ah, and Sayyiduna Ubayy (may Allah be pleased with him) also used to do the same.

Habib al-Mu'allim (may Allah have mercy on him) says that it was said to al-Hasan (may Allah have mercy on him) that Ibn Umar (may Allah be pleased with them both) used to say the salam after two rak'ahs of the witr. He said: Sayyiduna Umar (may Allah be pleased with him) had more understanding than him; he used to rise for the third rak'ah with the takbir.

Qays bin Sa'd (may Allah have mercy on him) narrates from Ata (may Allah have mercy on him) that he used to pray three witr, did not sit in between, and recited the tashahhud only in the last rak'ah.