(Imām Bukhārī narrates): 'Alī ibn 'Abdullāh narrated to us, he said: Sufyān narrated to us, he said: Al-Zuhrī narrated to us, from Mahmūd ibn al-Rabī', from 'Ubādah ibn al-Sāmit, may Allāh be pleased with him, that the Messenger of Allāh ﷺ said:

Whoever does not recite Sūrat al-Fātihah, his prayer is not complete.