'Ought' in the Bible

Then Abimelech called Abraham and said to him, “What have you done to us? And how have I offended you that you have brought on me and my kingdom a great sin? You have done to me what ought not to be done [to anyone].”

Now when Jacob’s sons heard of it they came in from the field; they were deeply grieved, and they were very angry, for Shechem had done a disgraceful thing to Israel by lying with Jacob’s daughter, for such a thing is not to be done.

Of the tribe of Issachar, men who understood the times, with knowledge of what Israel should do, two hundred chiefs; and all their relatives were at their command;

Do you not know that the Lord God of Israel, gave rule over Israel forever to David and to his sons by a covenant of salt [a permanent pact, extending to each generation of Israel]?

Make vows to the Lord your God and fulfill them;Let all who are around Him bring gifts to Him who is to be feared [with awe-inspired reverence].

O daughter of Babylon, you devastator,How blessed will be the oneWho repays you [with destruction] as you have repaid us.

Do you [who worship idols] not know? Have you not heard?Has it not been told to you from the beginning?Have you not understood from the foundations of the earth [the omnipotence of God and the stupidity of bowing to idols]?