Ibn Ezra on Genesis 9:11/אבן עזרא על בראשית ט׳:י״א

1[NEITHER SHALL ALL FLESH BE CUT OFF.] Flesh refers to the body. The body is so designated because flesh senses and the bones do not. The covenant is a promise that all bodies will never again be destroyed by a flood. God included in His covenant a pledge not to bring a comparable deluge ever again because the first part of His promise, neither shall all flesh be cut off any more by the waters of the flood, may be taken to imply that there will be other floods but that God will save humanity. It is concerning this covenant that the prophet says, For as I have sworn that the waters of Noah Should no more go over the earth (Is. 54:9).