פּירוש אויף ישעיהו 40:29

“He gives strength to the weary” [40:29]. When the Holy One wants to, He gives strength to Israel who are in exile to endure the difficult exile and, He strengthens those who are not strong.³Radak, Isaiah, 40:29.

Who gives the tired strength And who will eventually renew strength for your tiredness.

He giveth power, etc. How can He be weary, if He gives power to the faint, and strengthens him that is without strength. עָצְמָה Strength. It is a noun similar in form to חָבְמָה wisdom.