al-Harith bin Mskyn bin Muhammad الحارث بن مسكين بن محمد · The Book of Fasting

'Abdur-Rahman bin Zaid bin Al-Khattab addressed the people on the day concerning which there was doubt (as to whether the month had begun) and said: "I sat with the Companions of the Messenger of Allah and asked them, and they a narrated that the Messenger of Allah said: 'Fast when you see it and stop fasting when you see it, and perform the rites on that basis. If it is obscured, then complete thirty days, and if two witnesses testify…

"I heard the Messenger of Allah say: 'Fasting is a shield, so long as you do not damage it."'

"Hafsah, the wife of the Prophet said: 'There is no fast for the one who does not intend (to fast) before dawn."'

"There is no fast for the one who does not intend to fast before dawn."