The haftarah for parashat Ki Teitzei (i.e., Isa. 54:1-10) is the fifth of seven readings from the prophets that are consecutively read before Rosh Hashanah. These "haftarot of comfort" foretell of the restoration of the Jewish people and of the coming of the Messianic Era. In this week's reading, the LORD compares the children of Israel to a wife who has long been barren. According to the sages, God tells the "Wife of His youth" to sing out with joy, for soon she will have a hard time keeping track of all her children! Many will return by means of a mighty wave of repentance that will sweep over the world when Jerusalem is finally redeemed and the Mashiach reigns in Israel.
Though the LORD hardened Israel for a season (Rom. 11:25-29), His love for her is sure, and all His promises will be established. In the End of Days all Israel will be saved, in times "like the days of Noah." But just I God swore that the waters of Noah should no more go over the earth, so He has sworn that Israel will be regathered and restored.
רָנִּי עֲקָרָה לא יָלָדָה פִּצְחִי רִנָּה וְצַהֲלִי לא־חָלָה
כִּי־רַבִּים בְּנֵי־שׁוֹמֵמָה מִבְּנֵי בְעוּלָה אָמַר יְהוָה
ran·ni · ak·a·rah · lo · ya·la·dah · pitz·chi · rin·nah · ve·tza·ha·li · lo · cha·lah
ki · rab·bim · be·nei · sho·me·mah · mi·be·nei · ve·o·lah · a·mar · Adonai
"Sing, O barren one, who did not bear; break forth into singing and cry aloud,
you who have not been in labor! For the children of the desolate one
will be more than the children of her who is married," says the LORD."