1 Samuel 20:18-24

(18) Then Jonathan said to David, Tomorrow is the new moon: and thou shalt be missed, because thy seat will be empty. (19) And when thou hast stayed three days, then thou shalt go down quickly, and come to the place where thou didst hide thyself when the business was in hand, and shalt remain by the stone Ezel. (20) And I will shoot three arrows on the side thereof, as though I shot at a mark. (21) And, behold, I will send a lad, saying, Go, find out the arrows. If I expressly say unto the lad, Behold, the arrows are on this side of thee, take them; then come thou: for there is peace to thee, and no hurt; as the LORD liveth. (22) But if I say thus unto the young man, Behold, the arrows are beyond thee; go thy way: for the LORD hath sent thee away. (23) And as touching the matter which thou and I have spoken of, behold, the LORD be between thee and me forever. (24) В¶ So David hid himself in the field: and when the new moon was come, the king sat him down to eat meat.

If the Reader recollects, our dear Lord did not go up publicly to the feast, but after his brethren were gone, he then made a private visit there. John 7:1.