'Firmly' in the Bible

"I know your works and where you dwell, where Satan's throne is. You hold firmly to my name, and didn't deny my faith in the days of Antipas my witness, my faithful one, who was killed among you, where Satan dwells.

Nevertheless, hold that which you have firmly until I come.

I am coming quickly! Hold firmly that which you have, so that no one takes your crown.

After this I saw four angels stationed at the four corners of the earth, holding back the four winds of the earth so that no wind would blow on the earth or on the sea or on any tree.