'Ancient' in the Bible

Just as He promised by the mouth of His holy prophets from the most ancient times—

They answered, “John the Baptist, and some say, Elijah; but others, that one of the ancient prophets has come back to life.”

whom heaven must keep until the time for the [complete] restoration of all things about which God promised through the mouth of His holy prophets from ancient time.

For from ancient generations [the writing of] Moses has been preached in every city, since he is read aloud in the synagogues every Sabbath.”

and if He did not spare the ancient world, but protected Noah, a preacher of righteousness, with seven others, when He brought [the judgment of] a flood upon the world of the ungodly;