This is God's blessing. He told [Noah](rc://en/tw/dict/bible/names/noah) and his family to produce more humans like themselves, so that there would be many of them. The word "multiply" explains how they are to be "fruitful." See how you translated these commands in [Genesis 1:28](../01/28.md). (See: [[rc://en/ta/man/translate/figs-doublet]] and [[rc://en/ta/man/translate/figs-idiom]])