It is narrated from Bilal bin Ka'b 'Uki (may Allah have mercy on him) that I, Ibrahim bin Adham, Abdul Aziz bin Qareer, and Musa bin Yasar—all four of us—visited Yahya bin Hassan (may Allah have mercy on him) in his village, and he presented food. Musa bin Yasar did not eat because he was fasting. Yahya (may Allah have mercy on him) said: In this mosque, a companion (may Allah be pleased with him) from Banu Kinana, whose kunyah was Abu Qarsafah, led us in prayer for forty years. He used to fast one day and break his fast the next day. When a boy was born to my father, he invited this companion (may Allah be pleased with him) on his fasting day, so he broke his fast. So Ibrahim got up and cleared a place for him with his sheet, and Musa broke his fast. Imam Bukhari (may Allah have mercy on him) says: Abu Qarsafah's name was Jundarah bin Khishnah.