'Firmly' in the Bible

And the priests carrying the ark of the covenant of Yahweh stood firmly on the dry land in the middle of the Jordan while all Israel crossed on dry ground, until all the nation finished crossing the Jordan.

and command them, saying, 'Take for yourselves twelve stones from the middle of the Jordan where the priests' feet stood firmly, and bring them over with you, and set them up in {the place where you will camp tonight}.'"