'Tightly' in the Bible

"For you set aside the commandment of God, and hold tightly to the tradition of men -- the washing of pitchers and cups, and you do many other such things."

That in the good ground, these are such as in an honest and good heart, having heard the word, hold it tightly, and bring forth fruit with patience.

Having then a great high priest, who has passed through the heavens, Jesus, the Son of God, let us hold tightly to our confession.