'Know' in the Bible

So David said to Joab and to the princes of the people, “Go, number Israel from Beersheba even to Dan, and bring me word that I may know their number.”

“As for you, my son Solomon, know the God of your father, and serve Him with a whole heart and a willing mind; for the Lord searches all hearts, and understands every intent of the thoughts. If you seek Him, He will let you find Him; but if you forsake Him, He will reject you forever.

Since I know, O my God, that You try the heart and delight in uprightness, I, in the integrity of my heart, have willingly offered all these things; so now with joy I have seen Your people, who are present here, make their offerings willingly to You.