'Knows' in the Bible

He said, "When the child [was] still alive, I fasted and I wept because I thought, 'Who knows? Yahweh may have mercy on me that the child will live.'

Joab fell with his face to the ground and did obeisance. And he blessed the king, and he said, "Today your servant knows that I have found favor in your eyes, my lord the king, [in] that the king has granted the request of his servant."

And he [is] also a {valiant warrior}, whose heart [is] like the heart of the lion. He will {certainly melt} with fear, for all Israel knows that your father [is] a mighty warrior and [those] who [are] with him [are] {valiant warriors}.

For your servant knows that I have sinned; look, I have come this day [as the first] of all the house of Joseph to come down to meet my lord the king."