الكافي 2/2/1/7

7. A number of our people have narrated from Ahmad ibn Muhammad ibn ‘Isa from al-Husayn ibn Sa’Id from al-Nadr ibn Suwayd from al-Qasim ibn Sulayman from ‘Ubayd ibn Zurara from his father from a man who has said the following: “Abu ‘Abd Allah عليه السلام has said, pleading before Allah for help is the form of worship about which Allah, the Most Majestic, the Most Holy, has said, ‘Those who consider themselves above the need to worship Me will soon go to hell in disgrace,’ (40:60) pray to Allah, the Majestic, the Glorious, and do not say that things are already determined and settled (due to predestination).’ “Zurara has said, ‘The Imam thereby has meant that your belief in Allah’s decision and His measures should not stop you from praying to Allah and pleading before Him for help with seriousness and enthusiasm just as he (the Imam) has said.’”