Sayyiduna Ibn Umar (may Allah be pleased with them both) narrates that the Messenger of Allah (peace and blessings be upon him) said: "A month is like this, like this, and like this—thirty days. And a month is also like this and like this." And on the third (time), he folded his thumb (meaning, the month can also be twenty-nine days). "And if clouds cover you, then complete thirty days (of Sha'ban)." In the narration of Ibn Fudayl, it is mentioned: "Then the Prophet (peace and blessings be upon him) opened his hand and folded one finger (indicating twenty-nine). Then if clouds cover you, complete thirty days (of Sha'ban)."