וַיֹּ֙אמֶר֙ יְחִזְקִיָּ֔הוּ נָקֵ֣ל לַצֵּ֔ל לִנְט֖וֹת עֶ֣שֶׂר מַעֲל֑וֹת לֹ֣א כִ֔י יָשׁ֥וּב הַצֵּ֛ל אֲחֹרַנִּ֖ית עֶ֥שֶׂר מַעֲלֽוֹת׃
At sumagot si Hezekias: “Madali lang para sa anino ang umusad nang sampung baitang. Hindi, kundi bumalik nawa ang anino nang sampung baitang paatras.”
Rashi
And Chizkiyohu said, ”It is easier for the shade to advance ten steps.” It is easy [for the shade] to remain in its place, and stay for ten steps, it is not something that is so conspicuous. Not so, rather let the shade go back, and the event will be a wonder, for they saw that the day was turning toward evening, and it returns to become morning [again].