'Firmly' in the Bible
"Friend," said Jesus, "carry out your intention." Then they came and laid their hands on Jesus and seized Him firmly.
Dependent on Him, the whole body--its various parts closely fitting and firmly adhering to one another-- grows by the aid of every contributory link, with power proportioned to the need of each individual part, so as to build itself up in a spirit of love.
if, indeed, you are still firmly holding to faith as your foundation, without ever shifting from your hope that rests on the Good News that you have heard, which has been proclaimed in the whole creation under Heaven, and in which I Paul have been appointed to serve.
having the roots of your being firmly planted in Him, and continually building yourselves up in Him, and always being increasingly confirmed in the faith as you were taught it, and abounding in it with thanksgiving.
Inasmuch, then, as we have in Jesus, the Son of God, a great High Priest who has passed into Heaven itself, let us hold firmly to our profession of faith.
Let us hold firmly to an unflinching avowal of our hope, for He is faithful who gave us the promises.