'Fast' in the Bible

For He spoke, and it was done;He commanded, and it stood fast.

For Your arrows have sunk into me and penetrate deeply,And Your hand has pressed down on me and greatly disciplined me.

“A wicked thing is poured out upon him and holds him;And when he lies down, he will not rise up again.”

“My lovingkindness I will keep for him forevermore,And My covenant will be confirmed to him.

They are upheld forever and ever;They are done in [absolute] truth and uprightness.

Your faithfulness continues from generation to generation;You have established the earth, and it stands [securely].

Those who trust in and rely on the Lord [with confident expectation]Are like Mount Zion, which cannot be moved but remains forever.