5 So David said, “Look, tomorrow is the New Moon feast, and I am supposed to dine with the king; but let me go and hide in the field until the evening of the day after tomorrow.

Read 1 Samuel 20:5 Using Other Translations

And David said unto Jonathan, Behold, to morrow is the new moon, and I should not fail to sit with the king at meat: but let me go, that I may hide myself in the field unto the third day at even.
David said to Jonathan, "Behold, tomorrow is the new moon, and I should not fail to sit at table with the king. But let me go, that I may hide myself in the field till the third day at evening.
David replied, “Tomorrow we celebrate the new moon festival. I’ve always eaten with the king on this occasion, but tomorrow I’ll hide in the field and stay there until the evening of the third day.