1 Samuel 20:3-5

King James Version

³ And David sware moreover, and said, Thy father certainly knoweth that I have found grace in thine eyes; and he saith, Let not Jonathan know this, lest he be grieved: but truly as the Lord liveth, and as thy soul liveth, there is but a step between me and death.

⁴ Then said Jonathan unto David, Whatsoever thy soul desireth, I will even do it for thee.

⁵ 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.