A Measure of Acceptance of Deeds
قَالَ الصَّادِقُ(ع): أَوَّلُ مَا يُحَاسَبُ بِهِ الْعَبْدُ الصَّلاةُ فَإِنْ قُبِلَتْ قُبِلَ سَائِرُ عَمَلِهِ وَ إِذَا رُدَّتْ رُدَّ عَلَيْهِ سَائِرُ عَمَلِهِ
Imam Sadiq (A.S) has said: “The first thing for which a person shall be subjected to reckoning is prayers. If they are accepted, all his other deeds shall (also) be accepted. But if rejected, all his other deeds shall (also) be rejected.”
Wasa’ilush Shi`a, Volume 3, Page 22
Other links:
The Reward of Angels worship for the Visitors of Imam Hussein's (A.S) Grave