Exodus 23:11
But the seventh year thou shalt let it rest and lie still; that the poor of thy people may eat: and what they leave the beasts of the field shall eat. In like manner thou shalt deal with thy vineyard, and with thy oliveyard.
Cross-reference
Leviticus 25:2-7 expands on the seventh-year rest, detailing fallow land and what may be eaten — a fuller version of Exodus 23:11.
Leviticus 25:11 extends the land-rest principle to the Jubilee year — both command no sowing or reaping, but Jubilee is every 50th instead of 7th.
Leviticus 25:12 describes eating the spontaneous produce during Jubilee — parallel to Exodus 23:11's allowance for the poor to eat from the fallow land.
Leviticus 25:20 voices the same concern about food during the seventh year that Exodus 23:11 implies, leading to God's promise of provision.
Leviticus 25:22 promises that the sixth year's bounty will last through the seventh and eighth years — directly addressing the need behind Exodus 23:11's command.
Leviticus 26:34 shows that if Israel disobeys the Sabbath-year command, the land will rest during exile — a consequence tied to Exodus 23:11.
Leviticus 26:35 continues the exile theme: the land will finally get the rest Israel failed to give it each seventh year as commanded in Exodus 23:11.
Leviticus 25:4 is the parallel passage to Exodus 23:11 — it gives the same Sabbath-year law with more detail about not sowing or pruning.
Leviticus 25:6 specifies that the Sabbath-year produce feeds everyone — expanding Exodus 23:11's provision for the poor and wild animals.
In Jeremiah 34:14, God commands release of Hebrew slaves after six years, echoing the sabbatical rest principle of Exodus 23:11 though applying to persons.
Deuteronomy 15:1 commands debt release every seven years — a different institution but same cycle as the land rest in Exodus 23:11. Parallel concept.