I do not know about this, artists sometimes rip each other for stealing songs from them, music, lyrics and concepts. I do not think I have ever seen one accuses the other of stealing's a prayer they had put their voice. Randa Hafez, the young Egyptian pop star released a supplication in 2011, the verses of her prayer have been written be the late poet Magdy Al Najjar.
Fast-forward to 2014, and it seems the same track has been picked up by Amr Diab whose friendship with the late poet is hard to deny. Now Randa Hafez considers the late poet her mentor. Randa wrote about this on her Facebook, but it seems that post has been removed. She said she was not upset that Amr chose to perform that track--she is only hurt that he chose the one track that has been written by her mentor.
The lyrics are the same, the titles are not. Randa is a huge fan of Amr Diab, she even titled her 2008 (Mayalah) in the fashion of a beloved Amr Diab song (Mayal).
Randa Hafez - Batlob El Hidaya / راندا حافظ - بطلب الهداية
Amr Diab - Prayer ALLAH (God) عمرو دياب - دعاء اللَّه