Contradiction with Exodus 23:15
This verse states that the Feast of Unleavened Bread should be kept, whereas Deuteronomy 16:10 focuses on the Feast of Weeks.
Exodus 23:15: Thou shalt keep the feast of unleavened bread: (thou shalt eat unleavened bread seven days, as I commanded thee, in the time appointed of the month Abib; for in it thou camest out from Egypt: and none shall appear before me empty:)
Contradiction with Leviticus 23:16
Here, the offering of new grain is commanded at a different time, conflicting with Deuteronomy 16:10's timing for the Feast of Weeks celebration.
Leviticus 23:16: Even unto the morrow after the seventh sabbath shall ye number fifty days; and ye shall offer a new meat offering unto the LORD.
Contradiction with Numbers 28:26
This verse specifies an offering of two loaves of bread, which contradicts the offering instructions given in Deuteronomy 16:10.
Numbers 28:26: Also in the day of the firstfruits, when ye bring a new meat offering unto the LORD, after your weeks [be out], ye shall have an holy convocation; ye shall do no servile work:
Contradiction with Exodus 34:22
The timing described here for the Feast of Weeks appears to differ from the timing in Deuteronomy 16:10.
Exodus 34:22: And thou shalt observe the feast of weeks, of the firstfruits of wheat harvest, and the feast of ingathering at the year's end. [year's end: Heb. revolution of the year]
Contradiction with Deuteronomy 16:16
This verse lists multiple feasts that require appearing before the Lord, potentially conflicting with the focus on the single feast in Deuteronomy 16:10.
Deuteronomy 16:16: Three times in a year shall all thy males appear before the LORD thy God in the place which he shall choose; in the feast of unleavened bread, and in the feast of weeks, and in the feast of tabernacles: and they shall not appear before the LORD empty: