Leviticus 25:3
Six years thou shalt sow thy field, and six years thou shalt prune thy vineyard, and gather in the fruit thereof;
Cross-reference
Genesis 2:3
Parallel
Genesis 2:3 shows God's six-day work then rest pattern; here the agricultural cycle follows that same rhythm.
Exodus 23:10
Parallel
Exodus 23:10 has nearly identical wording for working six years then resting the seventh; here it is reiterated as the sabbath year.