וּבָ֗את וְסָגַ֤רְתְּ הַדֶּ֙לֶת֙ בַּעֲדֵ֣ךְ וּבְעַד־בָּנַ֔יִךְ וְיָצַ֕קְתְּ עַ֥ל כָּל־הַכֵּלִ֖ים הָאֵ֑לֶּה וְהַמָּלֵ֖א תַּסִּֽיעִי׃
Dann geh hinein, verschließe die Tür hinter dir und hinter deinen Söhnen und gieße in all diese Gefäße; was voll ist, rücke hinweg.
Malbim
• In the second statement he reproves Job for having the nerve (Lamentations 3:41) to inquire into matters greater and more wondrous than he can imagine such as the immortality of the soul, the substance of knowledge, free-will and so on. Man does not even comprehend God’s wisdom in those natural things he sees in front of his eyes. And since He has closed the door in front of him (2Kings 4:4), preventing him from entering the inner sanctuary (Leviticus 10:18) to look at God (Exodus 3:6) and to investigate metaphysical matters, he should have hidden his face (Micah 3:4) and not climbed God’s mountain or even touched its edge (Exodus 19:12).
Rashi
And I said... the earth - its bars are closed on me Heb. בַּעֲדִי, against me, over me it is closed, and I will never go out. closed on me Heb. בַּעֲדִי. cf. (II Kings 4:4) “And you shall close the door about yourself (בַּעֲדֵךְ).” And so is every instance of בְּעַד in Scriptures, e.g. (Job 2:4) “Skin against (בְּעַד) skin,” a limb against a limb.
Rashi
ויסגור ה' בעדו AND THE LORD SHUT HIM IN — He protected him so that they could not smash up the Ark (cf. 5:13): He surrounded the Ark (thus enclosing it סגר) with bears and lions which killed some of them (Genesis Rabbah 32:8). But the literal meaning of the text is: He shut the door in front of him against the waters. Similarly, wherever בעד occurs in the Scriptures it means כנגד in front of. E. g., (20:18) “The lord had made a closure in front of (בעד) every womb”; (2 Kings 4:4) “Close the door in front of thyself (בעדך) and in front of (ובעד) thy sons”; (Job 2:4) ‘‘skin in front of (as a protection for) (בעד) skin”; (Psalms 3:4) “a shield in front of me ובעדי”: (1 Samuel 12:19) “Pray (בעד) thy servants” which means כנגד in front of (i. e. on behalf of, as a protection for) thy servants.