'Keep' in the Bible

But Peter said, Ananias, why hath Satan filled thy heart to lie to the Holy Spirit, and to keep back part of the price of the land?

But there rose up certain of the sect of the Pharisees who believed, saying, It is needful to circumcise them, and to charge them to keep the law of Moses.

that ye abstain from things sacrificed to idols, and from blood, and from things strangled, and from fornication; from which if ye keep yourselves, it shall be well with you. Fare ye well.

And as they went on their way through the cities, they delivered them the decrees to keep which had been ordained of the apostles and elders that were at Jerusalem.

And when they had laid many stripes upon them, they cast them into prison, charging the jailor to keep them safely:

But as touching the Gentiles that have believed, we wrote, giving judgment that they should keep themselves from things sacrificed to idols, and from blood, and from what is strangled, and from fornication.