In 2 Corinthians 9:6, Paul introduces the sowing/reaping principle that 9:10 grounds in God's supply of seed.

In Proverbs 11:18, sowing righteousness brings a sure reward—Paul promises a 'harvest of righteousness' from multiplied seed.

In Isaiah 55:10, 'seed to the sower and bread to the eater' is the phrase Paul alludes to for God's provision.

Hosea 10:12 uses identical sowing-reaping language for righteousness, calling Israel to seek the Lord for rain of righteousness.

Philippians 1:11 uses the exact phrase 'fruit of righteousness' that comes through Christ — directly echoing this harvest imagery.

Psalm 112:9 is the OT quote just before this verse, linking generous giving to enduring righteousness — here Paul applies it to God's supply of seed.

Genesis 26:12 records Isaac receiving a hundredfold harvest as God's blessing — a literal example of God multiplying seed.

Leviticus 25:21 promises God will command a supernaturally abundant crop — similar to God multiplying seed for the sower.

Psalm 107:37-38 describes God blessing fields with fruitful yield and multiplying people — a parallel to God's provision for sowing.

Psalm 132:15 shows God blessing with abundant provisions and satisfying the poor — a parallel promise of divine provision for generosity.

In Philippians 4:17, Paul speaks of 'fruit that increases to your credit' — the same image of spiritual profit from generosity.

Matthew 6:1 warns against practicing righteousness for human praise — contrasting with the divine reward implied in the harvest here.

Matthew 13:23 uses the same seed-and-harvest imagery for hearing the word — a parallel metaphor but here applied to material generosity.