John Calvin on Genesis 9:7

7. And you , be ye fruitful and multiply . He again turns his discourse to Noah and his sons, exhorting them to the propagation of offspring: as if he would say, ‘You see that I am intent upon cherishing and preserving mankind, do you therefore also attend to it.’ At the same time, in commending to them the preservation of seed, he deters them from murder, and from unjust acts of violence. Yet his chief end was that to which I have before alluded, that he might encourage their dejected minds. For in these words is contained not a bare precept, but also a promise.