Genesis 1:22
And God blessed them, saying, Be fruitful, and multiply, and fill the waters in the seas, and let fowl multiply in the earth.
Cross-reference
Genesis 1:28 applies the same 'be fruitful and multiply' blessing language to humans — extending the fruitfulness mandate from creatures to mankind.
In Genesis 1:20, God commands the waters to teem with living creatures—the direct narrative lead-in to the blessing in verse 22.
Genesis 8:17 reissues the same 'be fruitful and multiply' blessing to the animals after the flood — reinstating what was first spoken in creation.
Genesis 9:1 reapplies the 'be fruitful and multiply' blessing — spoken to creatures here — now to Noah and his sons after the flood.
Genesis 35:11 applies 'be fruitful and multiply' directly to Jacob — God's original blessing on creatures here extended to build a nation.
In Leviticus 26:9, God's covenant faithfulness includes turning to Israel to make them fruitful and multiply, echoing the creation blessing.
Psalm 107:38 says God blesses them, and they multiply greatly. Directly echoes the divine blessing leading to increase.