Matthew Poole and continuators on 1 Samuel 20:5

5 And David said unto Jonathan, Behold, tomorrow is the new moon , and I should not fail to sit with the king at meat : but let me go, that I may hide my self in the fields, unto the third day at even.

Which was a Solemn and Festival time, as among the Romans and other Heathens, so also with the Hebrews, who Solemnized it with offering Peace-offerings to God, and Feasting together upon the remainders of it, after the manner. See Numb. 10. 10. and 28. 11. Psal. 81. 3.

Then he useth to expect my company above other times.

i. e. Unto the next day but one after the New Moon; as appears by comparing v. 19, 27, 35. His meaning is not, that he should hide himself in any certain place all the three days, but that he should secure himself either at Bethlehem with his Friends, or in any other place till the third day.