וַיֹּ֥אמֶר חִזְקִיָּ֖הוּ מָ֣ה א֑וֹת כִּ֥י אֶעֱלֶ֖ה בֵּ֥ית יְהוָֽה׃ (ס)
And Hezekiah said. 'What is the sign that I shall go up to the house of the LORD?’
Rashi on Isaiah
What a sign How good and how beautiful is this sign which is given to me that I will go up to the house of the Lord!
Ibn Ezra on Isaiah
ויאמר חזקיהו Hezekiah also had said before, What is the sign, as mentioned above (38:7)