"The Messenger of Allah would fasting during the beginning of every month for three days, and Friday was the least of the days that he did not fast."
Jami` at-Tirmidhi Book 8, Hadith 61
← Previous Hadith "A man asked Ali: "Which month do you order me to fast after the month of Ramadan?' He said to him, 'I have not heard anyone ask this except for a man whom I heard asking the Messenger of Allah while I was sitting with him. He said: "O Messenger of Allah! Which month do you order me to fast after the month of Ramadan?" He said: "If you will fast after the month of Ramadan, then fast Al-Muharram, for indeed it is Allah's month in which there is a day that Allah accepted the repentance of a people, and in which He accepts the repentance of other people."

Jami` at-Tirmidhi Book 8, Hadith 60 Next Hadith → the Messenger of Allah said: "None of you should fast on Friday unless he fasts before it, or he fasts after it."

Jami` at-Tirmidhi Book 8, Hadith 62