'Supplications' in the Bible

Hearken therefore unto the supplications of thy servant, and of thy people Israel, which they shall make toward this place: hear thou from thy dwelling place, even from heaven; and when thou hearest, forgive.

Then hear thou from the heavens, even from thy dwelling place, their prayer and their supplications, and maintain their cause, and forgive thy people which have sinned against thee.

and prayed to him. Moved by Manasseh's entreaties, the LORD heard his supplications and brought him back to his kingdom in Jerusalem. That's how Manasseh learned that the LORD is God.