1 Samuel 20:16

16 And if it comes about that the name of Jonathan is cut off from the family of David, the Lord will make David responsible.

1 Samuel 20:16 Meaning and Commentary

1 Samuel 20:16

So Jonathan made [a covenant] with the house of David
Not with David himself only, which was now renewed, but with his family also:

[saying], let the Lord even require [it] at the hand of David's
enemies;
take vengeance on Jonathan, or on any of his posterity, should they break this covenant, by showing themselves enemies to David, and his crown; and, on the other hand, also on David, and his posterity, should they not show kindness to Jonathan and his seed, according to the tenor of this covenant.

1 Samuel 20:16 In-Context

14 And may you, while I am still living, O may you be kind to me, as the Lord is kind, and keep me from death!

15 And let not your mercy ever be cut off from my family, even when the Lord has sent destruction on all David's haters, cutting them off from the face of the earth.

16 And if it comes about that the name of Jonathan is cut off from the family of David, the Lord will make David responsible.

17 And Jonathan again took an oath to David, because of his love for him: for David was as dear to him as his very soul.

18 Then Jonathan said to him, Tomorrow is the new moon: and it will be seen that you are not present, for there will be no one in your seat.