4:4 Now to the one who works, his pay is not credited due to grace but due to obligation. 1
Romans 4:16
4:16 For this reason it is by faith so that it may be by grace, 2 with the result that the promise may be certain to all the descendants – not only to those who are under the law, but also to those who have the faith of Abraham, 3 who is the father of us all
1 tnGrk “not according to grace but according to obligation.”