He prayed to him; and God was begged by him

The second phrase intensifies the first phrase and emphasizes the earnestness of Manasseh's prayer. This can be stated in active form. Alternate translation: "He prayed to God and begged him" (See: rc://en/ta/man/jit/figs-doublet and rc://en/ta/man/jit/figs-activepassive)

into his kingship

"to rule again as king"