Abdullaah Ibn Qaratnarrated from Allaah’s Messenger (salallaahu `alaihi wassallam) that he said:

 

“The first thing that the slave will be accounted for on the Day of Resurrection will be the prayer – if that is sound then the rest of the deeds will be sound, and if that is corrupt then the rest of the deeds shall be likewise corrupt.”

(At-Tabaraanee in Al-Awsat 1859; Al-Albaanee declared it saheeh in As-Saheehah 1358)