Romans 4:20-23

²⁰He was not led by want of faith to doubt God's promise.

²¹On the contrary, his faith gave him strength; and he praised God, in the firm conviction that what God has promised he is also able to carry out.

²²And therefore his faith ‘was regarded as righteousness.’

²³Now these words — ‘it was regarded as righteousness’ — were not written with reference to Abraham only;