Psalm 49:12 states the same comparison: man in pomp is like beasts that perish — verse 20 repeats it with 'without understanding'.

Psalm 73:18 shows the wicked set on slippery places to fall — the same fate as the pompous who perish like beasts.

Esther 5:11-14 shows Haman boasting in his wealth — a vivid example of the pompous man without understanding who perishes like a beast in Psalm 49:20.

Esther 7:10 records Haman's execution on his own gallows — the exact fate of the pompous man without understanding described in Psalm 49:20.

Job 4:21 says the foolish die without wisdom — directly paralleling the man without understanding in Psalm 49:20 who perishes like a beast.

Ecclesiastes 3:18 explicitly states God tests humans to show they are but beasts — directly reinforcing the same point.

Ecclesiastes 3:19 says man and beast share the same death — the very fate of the pompous without understanding.

Daniel 4:30 records Nebuchadnezzar's boast in his pomp — the very pride that leads to being made like a beast, illustrating Psalm 49:20.