English translation
[2505] 9 - (...) It was narrated from 'Abdullâh bin Dînâr that he heard Ibn 'Umar [may Allâh be pleased with them] say: "The Messenger of Allâh ﷺ said: 'The month is twenty-nine nights. Do not fast until you see it (the crescent), and do not break the fast until you see it, unless it is cloudy. If it is cloudy, then count it.'"
