'Ought' in the Bible

Then Abimelech called Abraham, and said unto him, What hast thou done unto us? And wherein have I sinned against thee, that thou hast brought on me and on my kingdom a great sin? Thou hast done deeds unto me that ought not to be done.

And the sons of Jacob came in from the field when they heard it: and the men were grieved, and they were very wroth, because he had wrought folly in Israel in lying with Jacob's daughter; which thing ought not to be done.

And she answered him, Nay, my brother, do not force me; for no such thing ought to be done in Israel: do not thou this folly.

And of the children of Issachar, men that had understanding of the times, to know what Israel ought to do, the heads of them were two hundred; and all their brethren were at their commandment.

Then David said, None ought to carry the ark of God but the Levites: for them hath Jehovah chosen to carry the ark of God, and to minister unto him for ever.

Ought ye not to know that Jehovah, the God of Israel, gave the kingdom over Israel to David for ever, even to him and to his sons by a covenant of salt?

Also I said, The thing that ye do is not good: ought ye not to walk in the fear of our God, because of the reproach of the nations our enemies?

Vow, and pay unto Jehovah your God: Let all that are round about him bring presents unto him that ought to be feared.