Galatians 3:6
"Even as Abraham believed God, and it was accounted to him for righteousness."
Cross References (ranked by relevance)
Genesis 15:6
24
And he believed in the LORD; and he counted it to him for righteousness.
James 2:23
16
And the scripture was fulfilled which saith, Abraham believed God, and it was imputed unto him for righteousness: and he was called the Friend of God.
Romans 4:24
But for us also, to whom it shall be imputed, if we believe on him that raised up Jesus our Lord from the dead;
Galatians 3:9
So then they which be of faith are blessed with faithful Abraham.