וְזֶה־לְּךָ֥ הָא֖וֹת מֵאֵ֣ת יְהוָ֑ה אֲשֶׁר֙ יַעֲשֶׂ֣ה יְהוָ֔ה אֶת־הַדָּבָ֥ר הַזֶּ֖ה אֲשֶׁ֥ר דִּבֵּֽר׃
E isto te será da parte do SENHOR como sinal de que o SENHOR cumprirá esta palavra que falou:
Ibn Ezra
ויאמר חזקיהו Hezekiah also had said before, What is the sign, as mentioned above (38:7)