19 The day after tomorrow, toward evening, go to the place where you hid when this trouble began, and wait by the stone Ezel.

Read 1 Samuel 20:19 Using Other Translations

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.
On the third day go down quickly to the place where you hid yourself when the matter was in hand, and remain beside the stone heap.
The day after tomorrow, toward evening, go to the place where you hid before, and wait there by the stone pile.