Ibrahim al-Nakha'i إبراهيم النخعي · The Book on Fasting

"The Messenger of Allah would kiss and fondle while he was fasting, and he had the most control among you of his limbs."

"I did not see the Prophet fasting at all during the ten."

"We would menstruate during the time of the Messenger of Allah, then when we became pure we were ordered to make up the fasts but we were not ordered to make up the Salat."

"The Messenger of Allah would struggle (to perform Salat more) during the last ten (nights) more than he would struggle in the rest of it."