Romans 4:16

Overview - Romans 4
Abraham's faith was imputed to him for righteousness;
10 before he was circumcised.
13 By faith only he and his seed received the promise.
16 Abraham is the father of all that believe.
24 Our faith also shall be imputed to us for righteousness.
Treasury of Scripture Knowledge

Romans 4:16  (King James Version)
Therefore it is of faith, that it might be by grace; to the end the promise might be sure to all the seed; not to that only which is of the law, but to that also which is of the faith of Abraham; who is the father of us all,

of faith
3:24-26 5:1 Galatians 3:7-12 Galatians 3:22 ; Ephesians 2:5 Ephesians 2:8 ; Titus 3:7

the promise
Hebrews 6:13-19 ; 2 Peter 1:10

but to

the father
9:8 Isaiah 51:2