Saul's servants spoke those words in the ears of David. David said, Seems it to you a light thing to be the king's son-in-law, seeing that I am a poor man, and lightly esteemed?
Though he was just a very young fellow, he was set over a part of the army and these guys respected him so much, of course God's deliverance of the Philistine in his hand, that they just accepted him, but then trouble began to arise.