Job 11:7 asks if one can fathom the deep things of God — directly parallel to Elihu's point that humans cannot presume to speak to Him.

Job 11:8 continues the thought of God's unsearchable height and depth — reinforcing the impossibility of human speech before Him.

Psalm 139:4 affirms that God knows every word before it is spoken — reinforcing Job's point that no one can inform God.

Matthew 12:36 warns of judgment for every careless word — a different angle on speech, but both highlight the weight of speaking before God.

Matthew 12:37 ties justification or condemnation to one's words — a broader principle than Job's specific fear of speaking to God.