הֲתִשְׁכַּ֤ח אִשָּׁה֙ עוּלָ֔הּ מֵרַחֵ֖ם בֶּן־בִּטְנָ֑הּ גַּם־אֵ֣לֶּה תִשְׁכַּ֔חְנָה וְאָנֹכִ֖י לֹ֥א אֶשְׁכָּחֵֽךְ׃
Rashi on Isaiah
Shall a woman forget her sucking child Heb. עוּלָהּ, similar to עוֹלֵל.
Ibn Ezra on Isaiah
Can a woman, etc. This is mentioned, because God has given to woman a natural disposition to have pity on her children.
Rashi on Isaiah
from having mercy on the child of her womb Heb. מֵרֶחֶם בֶּן-בִּטְנָהּ.