'Dug' in the Bible

he is like a [far-sighted, practical, and sensible] man building a house, who dug deep and laid a foundation on the rock; and when a flood occurred, the torrent burst against that house and yet could not shake it, because it had been securely built and founded on the rock.

“But be sure of this, that if the head of the house had known at what time the thief was coming, he [would have been awake and alert, and] would not have allowed his house to be broken into.