Matthew Poole and continuators on Isaiah 54:4

4 Fear not, for thou shalt not be ashamed : neither be thou confounded, for thou shalt not be put to shame: for thou shalt forget the shame of thy youth , and shalt not remember the reproach of thy widowhood any more.

For that Barrenness and Widow-hood, which once was the matter of thy grief and shame, because now thou shalt be delivered from it, and God will own thee for his Wife, and beget Children of thee; as it is explained in the following words.

It shall be forgotten both by thee and others: thou shalt not be upbraided with thy former barrenness in thy youthful state, nor consounded and tormented with the remembrance of it; both remembring and forgetting in Scripture use connote or comprehend those affections which naturally and usually follow upon them; so great shall be thy fertility and felicity, that it shall cause thee to forget thy former unfruitfulness and misery, as Men commonly do in like cases, as Gen. 41. 51. Iob 11. 16. Isa. 65. 16. Ioh. 16. 21.

That time and state when thou wert like a Widow disconsolate and desolate, forsaken by her Husband, and having in a manner no Children; which was a great reproach, especially among the Jews.

Marginal references: Ezek. 23. 8.