The term originates from Arabic and Urdu linguistic roots. Daf' (دفع) means to repel, remove, or ward off.
In Islamic theology, Dua (supplication) is the essence of worship. While destiny ( Qadr ) is fixed, the Prophet Muhammad (peace be upon him) taught that . dafil afat dua pdf link
It is specifically used to ask Allah to remove overwhelming troubles. The term originates from Arabic and Urdu linguistic roots
While there is no single "official" link, you can find the text and PDF versions of this and similar protective supplications through the following reputable sources: or ward off. In Islamic theology