Midrasch zu Bamidbar 30:4

(Deut. 29:11 [12]:) TO ENTER INTO THE COVENANT WITH THE LORD YOUR GOD, EVEN THROUGH HIS OATH. Three covenants did the Holy One make with Israel: one when they came out of Egypt, one when they stood before Mount Sinai, {one at Horeb,} and one here.⁷Tanh., Deut. 8:3. But why did he make <a covenant> with them here? Because they had {cooked} [revoked] the one which he had made with them <on Sinai>,⁸This identification appears in the parallel from the traditional Tanhuma. when they said (of the Golden Calf in Exod. 32:4): THIS IS YOUR GOD, O ISRAEL. For that reason he made < another covenant> with them on Horeb⁹The text should probably read: “With them here,” in accord with Codex Vaticanus Ebr. 34. and established a curse over it for whoever would go back on his words. Now the word, ENTER (rt.: 'BR), <can> only be in the sense of one who says to his companion: May this curse come (rt.: 'BR) upon me, if I go back on this word. And so you find that, when they provoked the Holy One, they went into captivity. What did Daniel say (in Dan. 7:11)? AND ALL ISRAEL HAS TRANSGRESSED (rt.: 'BR) YOUR TORAH [….] SO THE CURSE (alah) AND THE OATH ARE POURED DOWN UPON US. Now alah can only be a curse,¹⁰Alah can also mean “oath” and “covenant.” as where it is stated (in Numb. 5:27): AND THE WOMAN SHALL BECOME A CURSE (alah). <This is> to teach you that, just as one imposes an oath on the suspect adulteress, so the Holy One imposed an oath upon Israel. But perhaps you will say: Why all this bother? It is not because I need you? Rather what shall I do to you, when I have already sworn to your ancestors, that I will never change anything for you and your children? It is therefore stated (in Deut. 29:12 [13]): IN ORDER TO ESTABLISH YOU TODAY AS HIS PEOPLE […,] <AS HE SWORE TO YOUR ANCESTORS, TO ABRAHAM, TO ISAAC, AND TO JACOB>. It also says (in Cant. 7:6 [5]): THE KING IS BOUND BY THE TRESSES. Now no one is bound except by an oath. Thus it is stated (in Numb. 30:4 [3]): <WHEN A WOMAN VOWS A VOW TO THE LORD> AND BINDS HERSELF WITH A BOND <….> Therefore, one cannot break his oath.