Ellicott's Commentary for English Readers - 1 Samuel 20:16
(16) So Jonathan made a covenant.—It is not necessary to supply (as in the English Version) “saying,” but it is better to understand this verse as a remark interposed in the dialogue by the narrator, and to translate the Hebrew literally, “So Jonathan made a covenant with the house of David, and Jehovah required it at the hand of David’s enemies.” read more
John Dummelow's Commentary on the Bible - 1 Samuel 20:1-42
The Friendship of David and Jonathan4. Thy soul] a pathetic periphrasis for ’thou.’5. The new moon] Many nations of antiquity appear to have observed the day of the new moon as a religious festival. For its observance in Israel cp. 2 Kings 4:23; Isaiah 1:13; Amos 8:5 (where it is coupled with the sabbath) Numbers 10:10. Numbers 10:25 and Numbers 10:27 imply that David, like Abner, ate regularly at Saul’s table. 6. A yearly sacrifice] This refers to the ordinary annual festival of the family.... read more