Swyd bin Sa'id سويد بن سعيد · The Chapters on Marriage

that the Prophet passed by some part of Al-Madinah and saw some girls beating their Daff And singing, saying: “We are girls from Banu Najjar what an excellent neighbor is Muhammad.” The Prophet said: “Allah knows that you are dear to me.”

that the Prophet said: “Allah will not look at a man who has intercourse with his wife in her buttocks.”