'Strictly' in the Bible

and their eyes were opened, and Jesus strictly charged them, saying, 'See, let no one know;'

And he strictly charged them that they may tell no one about it,

but that it may spread no further toward the people, let us strictly threaten them no more to speak in this name to any man.'

saying, 'Did not we strictly command you not to teach in this name? and lo, ye have filled Jerusalem with your teaching, and ye intend to bring upon us the blood of this man.'