Du'a is More Likely to be Answered in Sujood
By Shaykhul Islaam Ibn Taymiyyah (rahimahullaah)
Regarding the words of the Prophet (peace and blessings of Allah be upon him),
“As for rukoo’, glorify your Lord there, and as for sujood (prostration) strive in du’aa’ therein, because then it is more likely that you will be answered”
[Narrated by Muslim]
This has the command to glorify Allah in rukoo’, and the command to make du’aa’ when prostrating indicates that du’aa’ in sujood is more likely to be answered than in rukoo’.
Hence he said, “because then it is more likely that you will be answered”. Likewise he also said, “The closest that the slave is to his Lord is when he is prostrating.” [Narrated by Muslim]. This is a command that du’aa’ should be made in sujood.
[Majmu’ al-Fatawa, 22/378]