'Firmly' in the Bible

‘Behold, the Lord is about to hurl you headlong, O man.And He is about to grasp you firmly

Therefore thus says the Lord God,“Behold, I am laying in Zion a stone, a tested stone,A costly cornerstone for the foundation, firmly placed.He who believes in it will not be disturbed.

Your tackle hangs slack;It cannot hold the base of its mast firmly,Nor spread out the sail.Then the prey of an abundant spoil will be divided;The lame will take the plunder.