1 Samuel 24:21

Swear now therefore unto me. — So strongly was Saul convinced at this moment that David would at no distant period of time occupy the throne of Israel that he entreated him, when that day should come, not to destroy all his (Saul’s) children. This barbarous custom has been always too common a practice in the jealous East. It seems to have been equally dreaded by Jonathan, who made — it will be remembered — this condition of mercy to be shown by David in his day of power to his (Jonathan’s) children a part of the solemn covenant concluded between them. (See 1 Samuel 20:15.) In the frequent dynastic changes which took place in the kingdom of Israel, we have instances of such wholesale massacres of the royal family of the fallen house. (See 1 Kings 15:29, where Baasha slew King Nadab, the son of Jeroboam, and took his throne. Then Baasha, we read, “smote all the house of Jeroboam; he left not to Jeroboam any that breathed; “and in 1 Kings 16:11, where Zimri murdered his master, King Baasha. Zimri, “as soon as he sat on his throne, slew all the house of Baasha: he left him not one, neither of his kinsfolks, nor of his friends.”) A similar massacre is described, only with more ghastly details, in 2 Kings 10, where “Jehu slew all that remained to Ahab in Samaria.” There the story is peculiarly an Oriental scene of history, with the seventy baskets containing the seventy heads of princes presented as an acceptable offering to the new stern king of Israel — Jehu. It was, therefore, no vain dread of what might happen in the future which made King Saul ask this of David. Doubtless the fear of some such awful catastrophe happening to his own loved children and friends was no small part of the punishment of Saul.