Yazid bin Zari' يزيد بن زريع · The Book on Fasting

"We were on a journey with the Messenger of Allah. Some of us were fasting and some of us broke their fast. The one who broke their fast had no objection to the one who fasted, and the one who fasted had no objection to the one who broke his fast. They saw that whoever had the strength to fast then that was good, and whoever was weak, then breaking it was better."

"I witnessed Umar bin Al-Khattab on the Day of Nahr beginning with the Salat before the Khutbah. Then he said: 'I heard the Messenger of Allah prohibit fasting on these two days. As for the Day of Fitr, then it is for you to take a break from your fasting, and a celebration for the Muslims. As for the Day of Adha, then eat from the flesh that you have sacrificed.'"

"My father narrated to me: 'The Night of Al-Qadr was mentioned in the presence of Abu Bakrah, so he said: "I do not search for it due to something that I heard from the Messenger of Allah, except for during the last ten (nights); for indeed I heard him say: 'Search for it when nine remain, or; when seven remain, or; when five remain, or; during the last three nights.'" He (Uyainah) said: "During the twenty (nights) of Ramadan, Abu…