English translation
2122. 'Abdullâh bin 'Umar said: "I heard the Messenger of Allâh ﷺ say: 'When you see the crescent then fast, and when you see it, then stop fasting, and if it is obscured from you (too cloudy), then work it out (from the beginning of the month, to complete thirty days).'" (Sahîh)
