 Also, it's the place that has the bread of the presence. Also, it's the place that has the priests. To have the bread of the presence and the priests suggests that at that time, it's very possible the tabernacle itself was in Nob. So that David flees to the place where he knows the presence of God is with his people. He flees to Nob because he's fleeing to the Lord for refuge. Knowing that the Lord has provided for him already, just as in the days of Goliath,