'Carefully' in the Bible

He sent them to Bethlehem and said, “Go and search carefully for the child. When you find Him, report back to me so that I too can go and worship Him.”

Then Herod, finding that the Magi had trifled with him, was furious, and sent and massacred all the boys under two years of age, in Bethlehem and all its neighbourhood, according to the date he had so carefully ascertained from the Magi.

And concerning them the prophecy of Isaiah is fulfilled that says: 'You will listen carefully yet will never understand, you will look closely yet will never comprehend.

"All of these," said the young man, "I have carefully kept. What do I still lack?"