'Know' in the Bible

David said to the young man who was telling him this, "How do you know that Saul and his son Jonathan are dead?"

You know Abner the son of Ner! Surely he came here to spy on you and to determine when you leave and when you return and to discover everything that you are doing!"

Hushai went on to say, "You know your father and his men -- they are soldiers and are as dangerous as a bear out in the wild that has been robbed of her cubs. Your father is an experienced soldier; he will not stay overnight with the army.

The king replied, "How is the young man Absalom?" Ahimaaz replied, "I saw a great deal of confusion when Joab was sending the king's servant and me, your servant, but I don't know what it was all about."

For I, your servant, know that I sinned, and I have come today as the first of all the house of Joseph to come down to meet my lord the king."

The king told Joab, the general in command of his army, "Go through all the tribes of Israel from Dan to Beer Sheba and muster the army, so I may know the size of the army."