Contradiction with Psalms 60:8
This verse repeats the same declaration as Psalms 108:9 without contradiction.
Psalms 60:8: Moab [is] my washpot; over Edom will I cast out my shoe: Philistia, triumph thou because of me. [triumph...: or, triumph thou over me: (by an irony]
Contradiction with Ezekiel 29:11
Contradicts by promising desolation to Egypt, unlike making Moab and Edom subservient as in Psalms 108:9.
Ezekiel 29:11: No foot of man shall pass through it, nor foot of beast shall pass through it, neither shall it be inhabited forty years.
Contradiction with Isaiah 19:2
Contradicts by describing internal conflict in Egypt, not conquest or subjugation of external nations as in Psalms 108:9.
Isaiah 19:2: And I will set the Egyptians against the Egyptians: and they shall fight every one against his brother, and every one against his neighbour; city against city, [and] kingdom against kingdom. [set: Heb. mingle]