Isaiah
Isaiah 54:4BSB·traditional attribution

Do not be afraid, for you will not be put to shame; do not be intimidated, for you will not be humiliated. For you will forget the shame of your youth and will remember no more the reproach of your widowhood.

Matthew Henry Presbyterian @wholebiblehenry

If we apply this to the state of the Jews after their return out of captivity, it is a prophecy of the increase of their nation after they were settled in their own land. Jerusalem had been in the condition of a wife written childless, or a desolate solitary widow; but now it is promised that the city should be replenished and the country peopled...

Commenting on Isaiah 54:1-5

John Gill Reformed Baptist @doctorgill

Fear not,.... The fulfilment of these things; however unlikely and unpromising they might seem, yet God was able to perform them; and therefore way should not be given to a fearful, distrustful, and unbelieving heart: for thou shall not be ashamed; as men are, when disappointed of what they have been hoping for and expecting; but so it should not be with the church, she...

Jamieson-Fausset-Brown Reformed @jfbcommentary

(Isa 41:10, Isa 41:14). shame of thy youth--Israel's unfaithfulness as wife of Jehovah, almost from her earliest history. reproach of widowhood--Israel's punishment in her consequent dismissal from God and barrenness of spiritual children in Babylon and her present dispersion (Isa 54:1; Isa 49:21; Jer 3:24-25; Jer 31:19; Hos 2:2-5).