Zayd bin Wahb al-Jhny زيد بن وهب الجهني · The Book of Hunting and Slaughtering

"A Bedouin brought a rabbit to the Messenger of Allah that he had grilled and placed it before him. The messenger of Allah refrained from eating but he told the people to eat. The Bedouin also refrained from eating, and the Messenger of Allah said to him: 'What is keeping you from eating?' He said: 'I fast three days of each month.' He Said: "If you are going to fast, then fast the bright days (Al-Ghurr)."

"Umar, May Allah be pleased with us on the day when we stopped at Al-Qaha?' Abu Dharr said: 'I was. A rabbit was brought to the Messenger Allah and the man who brought it said: I saw it bleeding (menstruating). The Prophet did not eat, then he said: "Eat." A man said: "I am fasting." He said: "What fast are you observing?" He said: "Three days each month" He said: "Why don't yo0u fast the bright shining days, the thirteenth,…

"We disturbed a rabbit in Marr Az-Zahran so I caught it, and brought it to Abu Talhah who slaughtered it, and sent me with its thighs and haunches to the Prophet and he accepted it."