When Abigail saw David, she hurried, and alighted from her donkey, and fell before David on her face, and bowed herself to the ground.
"When the Lord has appointed you prince over Israel"  (1 Samuel 25:30). Abigail, in this, recognized that God was Israel's true king, but that David would indeed rise to the throne of Israel as prince over God's people.  The knowledge of God's intentions concerning David were, at this time, apparently known throughout Israel, or at least in Judah where Abigail resided.