Laylat al-Qadr

Malik bin Marthad narrates from his father, who said: I asked Sayyiduna Abu Dharr (may Allah be pleased with him): Did you ask the Messenger of Allah (peace and blessings be upon him) about Laylat al-Qadr? He said: "I was the one among the people who asked him (peace and blessings be upon him) about it the most." I said: O Messenger of Allah! Tell me about Laylat al-Qadr: is it only in Ramadan, or in another month as well? He (peace and blessings be upon him) said: "Rather, it is only in Ramadan." I said: O Messenger of Allah! Does it remain as long as the prophets are present, and when the prophets pass away it is taken up, or will it remain until the Day of Resurrection? He (peace and blessings be upon him) said: "Rather, it will remain until the Day of Resurrection." I said: In which part of Ramadan is it? He (peace and blessings be upon him) said: "Seek it in the first ten and the last ten (nights of Ramadan)." Then the Messenger of Allah (peace and blessings be upon him) began speaking about other matters, and I seized the opportunity and asked again: O Messenger of Allah! In which of the twenty (nights) is it? He (peace and blessings be upon him) said: "Seek it in the last ten, and do not ask me about anything after this." Then the Messenger of Allah (peace and blessings be upon him) went on talking, and I seized the opportunity again and said: O Messenger of Allah! I adjure you by Allah to tell me on which nights of that ten it falls. He (peace and blessings be upon him) became so angry with me that he had never been so angry with me before or after, and he said: "If Allah had willed, He would have informed you of it. Seek it in the last seven nights."
This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs did not record it.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) used to invite me (to his gatherings) with the (senior) Companions of the Prophet (peace and blessings be upon him), and would say to me: "Do not speak until these people have spoken." One day he invited the Companions and asked them about Laylat al-Qadr: according to this saying of the Messenger of Allah (peace and blessings be upon him), "Seek it in the last ten," which night could it be? Some said the twenty-first, some the twenty-third, and someone said the twenty-fifth night, while I remained silent. Sayyiduna Umar (may Allah be pleased with him) said: "What is the matter with you that you are not speaking?" I said: O Commander of the Faithful! If you permit me, I will say something too. He said: "Speak; I only called you so that you would speak." I said: "Shall I present my opinion?" He said: "That is exactly what we are asking you for." I said: "It is the seventh night (the twenty-seventh), because I have seen that Allah mentioned seven heavens, made the number of the earths seven, made seven stages in the creation of man, and also mentioned the vegetation that grows from the earth in seven kinds." Sayyiduna Umar (may Allah be pleased with him) said: "You have told me what I already know; but what is it that I do not know, that the vegetation of the earth is seven?" I said: Allah Almighty says: "Then We split the earth, cleaving it well" [Surah Abasa: 26], until He said: "And fruit and fodder" [Surah Abasa: 31], and "abb" (fodder) refers to the vegetation of the earth that animals eat but people do not. At this Sayyiduna Umar (may Allah be pleased with him) said (to the other Companions): "Were you unable to say something like what this boy said, whose head has not yet fully matured (that is, who is still young)? By Allah! My opinion is the same as what you said." The narrator says that Sayyiduna Umar (may Allah be pleased with him) then said to me: "I had earlier forbidden you to speak until these elders had spoken, but now I order you to speak along with them."
This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs did not record it.

When Laylat al-Qadr was mentioned in the presence of Sayyiduna Abu Bakrah (may Allah be pleased with him), he said: "I seek it only in the last ten, on account of a hadith I heard from the Messenger of Allah (peace and blessings be upon him). I heard him (peace and blessings be upon him) say: 'Seek it in the last ten nights, when nine (nights of the month) remain, or seven remain, or five remain, or three remain, or on the last night.'" The narrator states that in the first twenty days of Ramadan Sayyiduna Abu Bakrah (may Allah be pleased with him) would pray as usual, like the rest of the year, but when the last ten began he would strive hard and exert himself (in worship).
This hadith has an authentic chain (sahih al-isnad), but the two Shaykhs did not record it.