'Ought' in the Bible

Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered.

For I say, through the grace given unto me, to every man that is among you, not to think of himself more highly than he ought to think; but to think soberly, according as God hath dealt to every man the measure of faith.

We then that are strong ought to bear the infirmities of the weak, and not to please ourselves.

for it pleased well, and their debtors they are, for if in their spiritual things the nations did participate, they ought also, in the fleshly things, to minister to them.

that you may receive her in the Lord [with love and hospitality], as God’s people ought to receive one another. And that you may help her in whatever matter she may require assistance from you, for she has been a helper of many, including myself.