I will destroy them with the earth - Not only the human race was to he destroyed, but all terrestrial animals, i.e. those which could not live in the waters. These must necessarily be destroyed when the whole surface of the earth was drowned. But destroying the earth may probably mean the alteration of its constitution. Dr. Woodward, in his natural history of the earth, has rendered it exceedingly probable that the whole terrestrial substance was amalgamated with the waters, after which the different materials of its composition settled in beds or strata according to their respective gravities. This theory, however, is disputed by others.

The end.

Jeremiah 51:13 O you that dwell on many waters, abundant in treasures, your end is come, and the measure of your covetousness.

Ezekiel 7:2-6 Also, you son of man, thus said the Lord GOD to the land of Israel; An end, the end is come on the four corners of the land...

Amos 8:2 And he said, Amos, what see you? And I said, A basket of summer fruit. Then said the LORD to me...

1 Peter 4:7 But the end of all things is at hand: be you therefore sober, and watch to prayer.

filled.

Genesis 6:4,11,12 There were giants in the earth in those days; and also after that, when the sons of God came in to the daughters of men...

Genesis 49:5 Simeon and Levi are brothers; instruments of cruelty are in their habitations.

Hosea 4:1,2 Hear the word of the LORD, you children of Israel: for the LORD has a controversy with the inhabitants of the land...

and behold.

Genesis 6:17 And, behold, I, even I, do bring a flood of waters on the earth, to destroy all flesh, wherein is the breath of life...

with. or, from.

Genesis 7:23 And every living substance was destroyed which was on the face of the ground, both man, and cattle, and the creeping things...

the earth.

Jeremiah 4:23-28 I beheld the earth, and, see, it was without form, and void; and the heavens, and they had no light...

Hebrews 11:7 By faith Noah, being warned of God of things not seen as yet, moved with fear, prepared an ark to the saving of his house...

2 Peter 3:6,7,10-12 Whereby the world that then was, being overflowed with water, perished...

Covenanting Performed in Former Ages with Approbation from Above.
That the Lord gave special token of his approbation of the exercise of Covenanting, it belongs to this place to show. His approval of the duty was seen when he unfolded the promises of the Everlasting Covenant to his people, while they endeavoured to perform it; and his approval thereof is continually seen in his fulfilment to them of these promises. The special manifestations of his regard, made to them while attending to the service before him, belonged to one or other, or both, of those exhibitions …
John Cunningham—The Ordinance of Covenanting

Noah's Faith, Fear, Obedience, and Salvation
We may take pleasure in thinking of Noah as a kind of contrast to Enoch. Enoch was taken away from the evil to come: he saw not the flood, nor heard the wailing of those who were swept away by the waterfloods. His was a delightful deliverance from the harvest of wrath which followed the universal godlessness of the race. It was not his to fight the battle of righteousness to the bitter end; but by a secret rapture he avoided death, and escaped those evil days in which his grandson's lot was cast. …
Charles Haddon Spurgeon—Spurgeon's Sermons Volume 36: 1890

Covenanting Enforced by the Grant of Covenant Signs and Seals.
To declare emphatically that the people of God are a covenant people, various signs were in sovereignty vouchsafed. The lights in the firmament of heaven were appointed to be for signs, affording direction to the mariner, the husbandman, and others. Miracles wrought on memorable occasions, were constituted signs or tokens of God's universal government. The gracious grant of covenant signs was made in order to proclaim the truth of the existence of God's covenant with his people, to urge the performance …
John Cunningham—The Ordinance of Covenanting