1 Kings 1:23
And they told the king, saying, Behold Nathan the prophet. And when he was come in before the king, he bowed himself before the king with his face to the ground. And they told the king, saying, Behold Nathan the prophet. And when he was come in before the king, he bowed himself before the king with his face to the ground.
The moment belongs to David's old age, when Adonijah was rising in rebellion against his father's throne. Into that crisis Nathan the prophet entered the king's presence to lay before him the danger to the promised succession of Solomon. His coming was deliberate and urgent, to report the threat and to move the king to act for Solomon's right. As he came in before the king he bowed himself low with his face to the ground, honoring David's royal authority while seeking his attention.