Ibn Ezra on Deuteronomy 24:15/אבן עזרא על דברים כ״ד:ט״ו

1IN THE SAME DAY THOU SHALT GIVE HIM HIS HIRE, NEITHER SHALL THE SUN GO DOWN UPON IT. A negative commandment follows the positive commandment for emphasis.

2UPON IT. His wages

3SETTETH HIS HEART. To sustain himself from it. He therefore hired himself out.