Contradiction with Exodus 35:21
Contradiction in offering motivation: Exodus 38:31 mentions materials used, while Exodus 35:21 describes the people's hearts being stirred to willingly contribute.
Exodus 35:21: And they came, every one whose heart stirred him up, and every one whom his spirit made willing, [and] they brought the LORD'S offering to the work of the tabernacle of the congregation, and for all his service, and for the holy garments.
Contradiction with Exodus 36:5-7
Contradiction in available materials: Exodus 38:31 discusses materials being used, while Exodus 36:5-7 states there were too many materials and the people were restrained from bringing more.
Exodus 36:5-7: And they spake unto Moses, saying, The people bring much more than enough for the service of the work, which the LORD commanded to make.
Contradiction with Exodus 40:33
Contradiction in completion details: Exodus 38:31 details parts of the Tabernacle, whereas Exodus 40:33 emphasizes the completion of the entire work.
Exodus 40:33: And he reared up the court round about the tabernacle and the altar, and set up the hanging of the court gate. So Moses finished the work.
Contradiction with Exodus 39:42-43
Contradiction in oversight: Exodus 38:31 focuses on the materials, whereas Exodus 39:42-43 is about Moses' inspection and blessing the completion work.
Exodus 39:42-43: According to all that the LORD commanded Moses, so the children of Israel made all the work.