'Strictly' in the Bible

Then answered one of the people and said, Thy father strictly adjured the people, saying, Cursed be the man that eateth food this day; and the people are faint.

and charged them strictly that they should not make him publicly known:

saying, We strictly enjoined you not to teach in this name: and lo, ye have filled Jerusalem with your doctrine, and purpose to bring upon us the blood of this man.