לֹ֤א יִרְעָ֙בוּ֙ וְלֹ֣א יִצְמָ֔אוּ וְלֹא־יַכֵּ֥ם שָׁרָ֖ב וָשָׁ֑מֶשׁ כִּי־מְרַחֲמָ֣ם יְנַהֲגֵ֔ם וְעַל־מַבּ֥וּעֵי מַ֖יִם יְנַהֲלֵֽם׃
They shall not hunger nor thirst, Neither shall the heat nor sun smite them; For He that hath compassion on them will lead them, Even by the springs of water will He guide them.
Ibn Ezra on Isaiah
שרב Heat. Comp. 35:7. Nor the sun smite them. Comp. The sun shall not smite thee by day (Ps. 121:6)