‏الصلاة : Hadeeth No:777 Abu Huraira reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: He who said his prayer, but did not recite the opening chapter of al-Kitab, his prayer is incomplete. He repeated it thrice....

‏الزكاة : Hadeeth No:2193 This hadith has been narrated by Shu'ba with the same chain of transmitters....