Contradiction with Numbers 11:33
While Psalms 78:29 describes how they were filled with food, Numbers 11:33 states that God's anger was kindled before they had finished eating.
Numbers 11:33: And while the flesh [was] yet between their teeth, ere it was chewed, the wrath of the LORD was kindled against the people, and the LORD smote the people with a very great plague.
Contradiction with Proverbs 23:21
Psalms 78:29 shows satisfaction after eating, Proverbs 23:21 warns that gluttony leads to poverty and drowsiness.
Proverbs 23:21: For the drunkard and the glutton shall come to poverty: and drowsiness shall clothe [a man] with rags.
Contradiction with Ezekiel 16:49
Psalms 78:29 illustrates fulfillment in eating, yet Ezekiel 16:49 cites fullness of bread as part of the sin of Sodom.
Ezekiel 16:49: Behold, this was the iniquity of thy sister Sodom, pride, fulness of bread, and abundance of idleness was in her and in her daughters, neither did she strengthen the hand of the poor and needy.
Contradiction with Philippians 3:19
Psalms 78:29 presents fulfillment through eating, whereas Philippians 3:19 warns of those whose end is destruction, whose god is their belly.
Philippians 3:19: Whose end [is] destruction, whose God [is their] belly, and [whose] glory [is] in their shame, who mind earthly things.)
Contradiction with Luke 12:19
Psalms 78:29 tells of being filled, but Luke 12:19 criticizes the idea of taking ease and being merry purely because of material abundance.
Luke 12:19: And I will say to my soul, Soul, thou hast much goods laid up for many years; take thine ease, eat, drink, [and] be merry.