Abdullah bin Abi Qais says that I was sent to Lady Aisha (may Allah be pleased with her) so that I could ask her about fasting in case the crescent of Ramadan is hidden, about voluntary prayers after Asr, and about continuous fasting (wisal). I presented myself before her and said: So-and-so sends you greetings and has sent me to ask you about voluntary prayers after Asr, about continuous fasting, and about the fasts of Ramadan. She narrated part of the hadith and said: The Messenger of Allah (peace and blessings be upon him) used to be more cautious regarding the days of Sha'ban than other months, then upon sighting the crescent of Ramadan, he would fast. If the crescent was not sighted, he would complete thirty days of Sha'ban, then fast.