 Taariikhda cad in sannadkan uu noqon doono sidan oo kale, oo sannadkan uu u dhici doona, ka dibna waxa run ma aha, maxaa yeelay, jadwalka aan la sameeyaan waqtiga ay Nabiga sallallaahu wa, laakiin Cumar ibn al-Khaththablah ayaa lagu wadaa sida ijtihad isaga, iyo xisaabinta hore ee ka bilaabataa ka haajirayo dhacdooyinkii Nabiga sallallaahu wa in Madiina. 