'One' in the Bible

“Oh, that there were even one among you [whose duty it is to minister to Me] who would shut the gates, so that you would not kindle fire on My altar uselessly [with an empty, worthless pretense]! I am not pleased with you,” says the Lord of hosts, “nor will I accept an offering from your hand.

Do we not all have one Father? Has not one God created us? Why do we deal treacherously with one another, profaning the covenant of our fathers [with God]?

But not one has done so who has a remnant of the Spirit. And what did that one do while seeking a godly offspring? Take heed then to your spirit, and let no one deal treacherously against the wife of your youth.

Then those who feared the Lord [with awe-filled reverence] spoke to one another; and the Lord paid attention and heard it, and a book of remembrance was written before Him of those who fear the Lord [with an attitude of reverence and respect] and who esteem His name.