Romans 4:3

4:3 For what does the scripture say? “Abraham believed God, and it was credited to him as righteousness.”

Romans 10:16

10:16 But not all have obeyed the good news, for Isaiah says, “Lord, who has believed our report?”

tn The term λογίζομαι (logizomai) occurs 11 times in this chapter (vv. 3, 4, 5, 6, 8, 9, 10, 11, 22, 23, 24). In secular usage it could (a) refer to deliberations of some sort, or (b) in commercial dealings (as virtually a technical term) to “reckoning” or “charging up a debt.” See H. W. Heidland, TDNT 4:284, 290-92.

sn A quotation from Gen 15:6.

sn A quotation from Isa 53:1.