The adhan for the khutbah on Friday

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that when the Prophet (peace and blessings be upon him) came out (to the mosque) on Friday and sat on the pulpit, (Sayyiduna) Bilal (may Allah be pleased with him) would call the adhan.
This hadith has a sahih (authentic) chain, because Hisham bin al-Ghaz is among those narrators whose hadith are collected; however, the two Shaykhs did not record it.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) settled upon the pulpit on Friday and said to the people: "Sit down." Sayyiduna Ibn Mas'ud (may Allah be pleased with him) heard this while he was at the door of the mosque, so he sat down right there. The Prophet (peace and blessings be upon him) said to him: "O Ibn Mas'ud! Come here (closer)."
This hadith is sahih (authentic) on the condition of the two Shaykhs, but they did not record it.

It is narrated from Abdullah bin al-Harith (the paternal cousin of Muhammad bin Sirin) that Sayyiduna Ibn Abbas (may Allah be pleased with them both) said to his mu'adhdhin on a rainy day: When you have said 'Ashhadu anna Muhammadan rasulullah' (I bear witness that Muhammad is the Messenger of Allah), do not say 'Hayya ala al-salah' (Come to the prayer); rather say: 'Sallu fi buyutikum' - "Pray in your homes." The narrator said: It was as if the people found this strange, so he said: This was done by one who was better than me (that is, the Prophet, peace and blessings be upon him). Indeed, the Friday (prayer) is obligatory, but I disliked to bring you out (of your homes) and have you walk in mud and water.

Sayyidah, the daughter of Harithah bin al-Nu'man (may Allah be pleased with her), narrates: I memorised Surah Qaf only from the blessed tongue of the Messenger of Allah (peace and blessings be upon him) (by hearing it), because he (peace and blessings be upon him) used to recite it every Friday (on the pulpit). She said: Our oven and the oven of the Messenger of Allah (peace and blessings be upon him) were one and the same.
This hadith is sahih (authentic) on the condition of Imam Muslim, but they did not record it! And Muhammad bin Ishaq has named the daughter of Harithah bin al-Nu'man in his narration:

Sayyidah Umm Hisham bint Harithah bin al-Nu'man (may Allah be pleased with her) narrates: I learned "Qaf. By the glorious Qur'an" from the blessed tongue of the Messenger of Allah (peace and blessings be upon him) (by hearing it). He (peace and blessings be upon him) used to recite it every Friday when he addressed the people.