'Faithfully' in the Bible

(For the Pharisees and all of the Jews do not eat unless they carefully wash their hands, holding firmly to the traditions of the elders;

and when they come from the market place, they do not eat unless they cleanse themselves [completely according to ritual]; and there are many other things [oral, man-made laws and traditions handed down to them] which they follow diligently, such as the washing of cups and pitchers and copper utensils.)

You disregard and neglect the commandment of God, and cling [faithfully] to the tradition of men.”

So they [carefully and faithfully] kept the matter to themselves, discussing and questioning [with one another] what it meant to rise from the dead.