Translations
…and did not spare the ancient world — though He kept Noah safe, a herald of righteousness, along with seven others — when He unleashed the great flood upon that world of ungodly people —
…and did not spare the ancient world, but guarded Noach — a herald of righteousness — as one of eight, when He brought the flood upon a world of the godless —
And spared not the old world, but saved Noah the eighth person, a preacher of righteousness, bringing in the flood upon the world of the ungodly;
if He did not spare the ancient world when He brought the flood on its ungodly people, but preserved Noah, a preacher of righteousness, among the eight;

