31.131 http://mohammeds-koran.com/texts/hadith/bukhari/31/31.131 http://mohammeds-koran.com/@@site-logo/Jihad_Sword_White_Background.png 31.131 Narrated Abdullah bin Umar: Allah's Apostle said, "The month (can be) 29 nights (i.e. days), and do not fast till you see the moon, and if the sky is overcast, then complete Sha'ban as thirty days."