And God said unto Noah, This is the token of the covenant, which I have established between me and all flesh that is upon the earth.
God seals His covenant as men seal their agreements, to make both promise and performance sure. He repeats His assurance over and over: I set My bow, it shall be seen, it shall be the token, I will remember. The rainbow appears when clouds threaten most; in our darkest fear, God shows us the seal that the waters shall not prevail.
AI summary
Commenting on Genesis 9:12-17
And God said to Noah, this is the token of the covenant,.... Which is repeated for the greater confirmation and certainty of it, since the fears of men would be apt to run very high, especially while the flood was fresh in memory: which I have established between me and all flesh that is upon the earth: see Gen 9:9, it is highly probable, that...
And God said unto Noah, This [is] the token of the covenant, which I have established between me and all flesh that [is] upon the earth. (m) God repeats this often to confirm Noah's faith even more.