1 Samuel 20:5

Overview - 1 Samuel 20
David consults with Jonathan for his safety.
11 Jonathan and David renew their covenant by oath.
18 Jonathan's token to David.
24 Saul, missing David, seeks to kill Jonathan.
35 Jonathan affectionately takes his leave of David.
Treasury of Scripture Knowledge

1 Samuel 20:5  (King James Version)
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.

the new moon
The months of the Hebrews were lunar months, and they reckoned from one new moon to another: and, as their feasts, particularly the passover, were reckoned according to this, they were very scrupulous in observing the first appearance of each new moon. On these new moons, they offered sacrifices, and feasted together: but the gathering together of all the families of a tribe on such occasions seems to have taken place only once in the year.
6 ; Numbers 10:10 ; 28:11 2 Kings 4:23 ; Psalms 81:3 ; Colossians 2:16

that I may
19 ; 19:2 Psalms 55:12 ; Proverbs 22:3 ; John 8:59 ; Acts 17:14