Genesis 17:19

Genesis 21:2

Luke 1:36

36And listen! Elizabeth, your relative, has herself conceived a son in her old age. This is the sixth month for the woman who was said to be barren.

Romans 4:21

21being absolutely convinced that God would do what he had promised.Ps 115:3; Luke 1:37, 45; Heb 11:19

Hebrews 10:23

23Let us continue to hold firmly to the hope that we confess without wavering, for the one who made the promise is faithful.1Cor 1:9; 10:13; 1Thes 5:24; 2Thes 3:3; Heb 4:14; 11:11
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