Isaiah 54:9,10

The permanence of the new covenant relation is illustrated first by the promise made to Noah, of which the rainbow is the perpetual token, and then by the steadfastness of the unchanging hills.

For thisis as the waters of Noah unto me Or, according to the reading of several MSS. and the ancient versions (though not the LXX.), As the days of Noah is this (i.e. the present juncture) to me (see R.V. marg.). The difference of reading is very slight, consisting merely in the conjunction of two words which the received text separates (כימי for כי מי). The second alternative is better.

for as I have sworn &c. as I have sworn &c. (omitting "for"). Comp. Genesis 8:21 f., Isaiah 9:11-17. The absence of any mention of an oath in the narrative is immaterial.