Be fruitful and multiply

“Be fruitful and multiply” is a creation command and blessing that recurs at decisive moments in Genesis, joining the proliferation of living creatures and humanity to divine provision, survival, and covenant. First addressed to aquatic and winged life and then to human beings, it is spoken again to Noah and his sons after the flood, as the narrative turns from destruction toward the repopulation of the earth.

Creation and the scope of the blessing

On the fifth day, God blesses the creatures of the waters and the birds, commanding them to multiply and fill their respective domains. The formula places reproduction within the ordered world of creation: the waters swarm with life, birds multiply on the earth, and each is blessed to continue its kind.

The command is extended on the sixth day to humanity. God creates humankind, male and female, in the divine image, blesses them, and charges them to multiply, fill the earth, subdue it, and exercise dominion over other living things. This human commission is accompanied by provision: seed-bearing plants and fruit are given as food for people, while green plants are given to the animals. The scene closes with God’s judgment that everything made was very good.

Renewal after the flood

After the flood, God blesses Noah and his sons with the renewed command to be fruitful, multiply, and replenish the earth. The setting gives the formula a changed urgency: Noah’s household and the creatures brought out of the ark are the survivors from whom life is to spread again. God instructs Noah to bring out every living creature so that they may swarm and multiply on the earth.

The renewed blessing accompanies a changed account of human relations with animals and food. Living creatures are delivered into human hands, and moving things may be eaten as well as green plants, but flesh with its life—its blood—is forbidden. Human bloodshed is also made accountable: the rule against murder is grounded in the claim that humanity was made in the image of God.

A covenantal refrain

The command’s post-flood setting leads directly into a covenant with Noah, his descendants, and every living creature. God promises that no flood will again destroy all flesh and gives the bow in the cloud as the sign of this enduring covenant. The blessing to multiply thus belongs to a larger assurance that life on earth will continue.

Across the two settings, the repeated words link creation with restoration without making the situations identical. In the first, abundance unfolds within a world called very good; after the flood, multiplication is a promise and task for life emerging from catastrophe. The formula’s recurrence makes continuity itself a theme: despite human violence and the destruction of the flood, the earth is again to be filled with living beings.