Khalid bin Mahran al-Hadha' خالد بن مهران الحذاء · Fasting (Kitab Al-Siyam)

We kept fast for twenty-nine days along with the Prophet (ﷺ) more often than we kept fast for thirty days.

The tradition mentioned above (No. 2468) has also been transmitted by Abdullah ibn Budayl through a different chain of narrators in a similar way. This version adds: While he (Umar) was observing i'tikaf (in the sacred mosque), the people uttered (loudly): "Allah is most great." He said: What is this, Abdullah? He said: These are the captives of the Hawazin whom the Messenger of Allah (ﷺ) has set free. He said: This slave-girl too? He sent her along with them.