Musannaf Ibn Abi Shaybah 9712 — The new moon seen in the daytime

Abu Wa'il says: We were at a place called Khaniqin when a letter from Sayyiduna Umar (may Allah be pleased with him) came to us, in which it was written: Some new moons are bigger than others. When you see the new moon during the day, do not break the fast until two Muslim men testify that they sighted it the previous evening.