1 Samuel 20:15

15 and do not cut off your loyalty from my house for ever. When the LORD cuts off every one of the enemies of David from the face of the earth,

1 Samuel 20:15 Meaning and Commentary

1 Samuel 20:15

But also thou shalt not cut off thy kindness from my house
for ever
His family should partake of it as well as himself:

no, not when the Lord hath cut off the enemies of David, everyone
from the face of the earth;
Saul and his sons, and everyone that should oppose his settlement in the kingdom: Jonathan's meaning is, that the covenant between them should not be only between them personally, but include their posterity, as follows.

1 Samuel 20:15 In-Context

13 But should it please my father to do you harm, the LORD do so to Jonathan, and more also, if I do not disclose it to you, and send you away, that you may go in safety. May the LORD be with you, as he has been with my father.

14 If I am still alive, show me the loyal love of the LORD, that I may not die;

15 and do not cut off your loyalty from my house for ever. When the LORD cuts off every one of the enemies of David from the face of the earth,

16 let not the name of Jonathan be cut off from the house of David. And may the LORD take vengeance on David's enemies."

17 And Jonathan made David swear again by his love for him; for he loved him as he loved his own soul.