«أول ما يحاسب به العبد يوم القيامة الصلاة فإن صلحت صلح له سائر عمله وإن فسدت فسد سائر عمله»
The Prophet (peace and blessings be upon him) said:
"The first thing for which a servant will be held to account on the Day of Resurrection is the prayer. If it turns out sound, all the rest of his deeds will be sound, and if it turns out corrupt, all the rest of his deeds will be corrupt."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 2573