English translation
2130. It was narrated that Ribâ'î said: "The Messenger of Allâh ﷺ said: 'When you see the crescent then fast, and when you see it, then stop fasting. If it is too cloudy then complete Sha'bân as thirty days, unless you see the crescent before that, then fast Ramaḍân as thirty days, unless you see the new crescent before that.'" (Sahîh)
