'Diligently' in the Bible

And Simon and those [who were] with him searched diligently for him.

(for the Pharisees and all the Jews, unless they wash their hands diligently, do not eat, holding what has been delivered by the ancients;

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.)