פּירוש אויף ישעיהו 51:1

look at the rock whence you were hewn from it.

Hearken to me. The prophet speaks now to the good people, who believe in the words of the prophets.

and at the hole of the pit Heb. מַקֶּבֶת. With which they penetrate (נוֹקְבִין) and hew the pits. you were dug with which you were dug.

you were dug Heb. נֻקַּרְתֶּם, an expression similar to (Ex. 33.22) “The cleft (נִקְרַת) of the rock”; (Prov. 30:17) “The ravens of the brook shall pick it (יִקְּרוּהָ).” And who is the rock? He is Abraham your forefather. And who is the hole? She is Sarah who bore you. [תְּחוֹלֶלְכֶם means] ‘who bore you,’ an expression similar to (infra 66: 8) “For Zion experienced pangs (חָלָה) and also bore.”