6.2365 http://mohammeds-koran.com/texts/hadith/sahih-muslim/6/6.2365 http://mohammeds-koran.com/@@site-logo/Jihad_Sword_White_Background.png 6.2365 This hadith is narrated on the authority of 'Ubaidullah with the same chain of transmitters, and he said: If (the sky) is cloudy for you, then calculate thirty days (for the month of Ramadan).