Romans 4:20-22 AMPC
No unbelief or distrust made him waver (doubtingly question) concerning the promise of God, but he grew strong and was empowered by faith as he gave praise and glory to God,
Fully satisfied and assured that God was able and mighty to keep His word and to do what He had promised.
That is why his faith was credited to him as righteousness (right standing with God).
AMPC: Amplified Bible, Classic Edition