בְּיַד־כָּל־אָדָ֥ם יַחְתּ֑וֹם לָ֝דַ֗עַת כָּל־אַנְשֵׁ֥י מַעֲשֵֽׂהוּ׃
He sealeth up the hand of every man, That all men whom He hath made may know it.
Rashi on Job
By the hand of every man he seals When a man sins before Him, the man himself signs his signature on the day of his death to the sins that he committed, which are written before him.
Rashi on Job
so that every man should know his deed to let him know for what he is being judged.