Leviticus 23:7
In the first day ye shall have an holy convocation: ye shall do no servile work therein.
Cross-reference
Leviticus 23:35
Parallel
Leviticus 23:35 applies the same holy convocation and no-work rule to the Feast of Tabernacles, paralleling the structure of this verse.
Numbers 28:18–25
Parallel
Numbers 28:18-25 prescribes the offerings and holy convocations for the same feast, reinforcing the command against ordinary work.
Exodus 12:16
Parallel
Exodus 12:16 gives the original instruction for holy assemblies on the first and seventh days of Unleavened Bread, echoing this verse.