Romans 4:16 (WEB)
For this cause it is of faith, that it may be according to grace, to the end that the promise may be sure to all the offspring, 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.
Catechism · 1
“Against all human hope, God promises descendants to Abraham, as the fruit of faith and of the power of the Holy Spirit.” — Catechism footnote: Cf. Gen 18:1-15; Lk 1:26-38. 54-55; Jn 1:12-13; Rom 4:16-21.
Fathers and councils · 2
John Chrysostom
““Therefore it is of faith, that it might be by grace, to the end the promise might be sure.” ( Rom. iv. 16.)” — the author cites it
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Tertullian
“…soul; yet it is to be feared, just on account of the injuriousness and violence of suitors: which (injuriousness and violence) even the father of the faith, Abraham, greatly feared in regard of his own wife’s grace; and Isaac, by falsely representing Rebecca as his sister, purchased safety by insult!” — editor's note: Comp. Rom. iv. 11, 16.
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