Ahmad ibn Abi Abdullah narrated from his father, from Muhammad ibn Abi Umayr, from Hariz, from Murazim, from Imam Jafar ibn Muhammad Al-Sadiq عليه السلام: "The prostration of gratitude (Sajdat al-Shukr) is obligatory upon every Muslim. It completes your prayer, pleases your Lord عز وجل, and amazes the angels. When a servant prays and then prostrates a prostration of gratitude, Allah سبحانه وتعالى, the Blessed and Exalted, removes the veil between the servant and the angels, and He says, 'O’ My angels, look at My servant. He has fulfilled My obligation, completed My covenant, and now prostrates to Me in gratitude for what I have bestowed upon him. O’ My angels, what does he deserve from Me?' The angels respond, 'Our Lord عز وجل, Your mercy.' Then Allah سبحانه وتعالى, the Blessed and Exalted, says, 'And what more does he deserve?' The angels reply, 'Your Paradise.' Allah سبحانه وتعالى, the Blessed and Exalted, says, 'And what more?' The angels respond, 'His needs being sufficed.' Allah سبحانه وتعالى, the Blessed and Exalted, continues, 'And what more?' This goes on until there is nothing good left to mention that the angels have not said. Then Allah سبحانه وتعالى, the Blessed and Exalted, says, 'O’ My angels, what remains?' The angels respond, 'Our Lord عز وجل, we have no more knowledge.' Allah سبحانه وتعالى, the Blessed and Exalted, then says, 'I will thank him just as he thanked Me, and I will turn to him with My favour, and I will show him My Face (The Infallible Aimmah).'"