וְתָבֹאנָה֩ לָּ֨ךְ שְׁתֵּי־אֵ֥לֶּה רֶ֛גַע בְּי֥וֹם אֶחָ֖ד שְׁכ֣וֹל וְאַלְמֹ֑ן כְּתֻמָּם֙ בָּ֣אוּ עָלַ֔יִךְ בְּרֹ֣ב כְּשָׁפַ֔יִךְ בְּעָצְמַ֥ת חֲבָרַ֖יִךְ מְאֹֽד׃
But these two things shall come to thee in a moment In one day, the loss of children, and widow-hood; In their full measure shall they come upon thee, For the multitude of thy sorceries, And the great abundance of thine enchantments.
Rashi on Isaiah
these two that you said that you would not sit as a widow and you would not know bereavement, shall suddenly come upon you.
Ibn Ezra on Isaiah
These two. The loss of the kingdom and the death of the children.