1 Samuel 20:27-29

27And it came to pass the next day after the new moon, the second [day of the month], as David's place was empty, that Saul said to Jonathan his son, Why has not the son of Jesse come to table, neither yesterday nor to-day?

28And Jonathan answered Saul, David earnestly asked leave of me [to go] to Bethlehem,

29and said, Let me go, I pray thee; for we have a family sacrifice in the city; and my brother himself has commanded me [to be there]; and now, if I have found favour in thy sight, let me go away, I pray thee, and see my brethren. He has therefore not come to the king's table.