Cross reference
1 Samuel 20:18
18 Then Jonathan said to him, Tomorrow is the new moon: and it will be seen that you are not present, for there will be no one in your seat.
1 Samuel 20:5
5 And David said to Jonathan, Tomorrow is the new moon, and I will not be seated with the king at his table: but let me go to a safe place in the country till the evening.
1 Samuel 20:25
25 And the king took his seat, as at other times, by the wall: and Jonathan was in front, and Abner was seated by Saul's side, but there was no one in David's seat.