30 And the anger of Saul burneth against Jonathan, and he saith to him, 'Son of a perverse rebellious woman! have I not known that thou art fixing on the son of Jesse to thy shame, and to the shame of the nakedness of thy mother? 31 for all the days that the son of Jesse liveth on the ground thou art not established, thou and thy kingdom; and now, send and bring him unto me, for he 'is' a son of death.' 32 And Jonathan answereth Saul his father, and saith unto him, 'Why is he put to death? what hath he done?' 33 And Saul casteth the javelin at him to smite him, and Jonathan knoweth that it hath been determined by his father to put David to death.
Matthew Henry's Commentary on 1 Samuel 20:30-33
Commentary on 1 Samuel 20:24-34
(Read 1 Samuel 20:24-34)
None were more constant than David in attending holy duties; nor had he been absent, but self-preservation obliged him to withdraw. In great peril present opportunities for Divine ordinances may be waved. But it is bad for us, except in case of necessity, to omit any opportunity of statedly attending on them. Jonathan did wisely and well for himself and family, to secure an interest in David, yet for this he is blamed. It is good to take God's people for our people. It will prove to our advantage at last, however it may now be thought against our interest. Saul was outrageous. What savage beasts, and worse, does anger make men!