וְעָשִׂ֖יתָ כְּחָכְמָתֶ֑ךָ וְלֹֽא־תוֹרֵ֧ד שֵׂיבָת֛וֹ בְּשָׁלֹ֖ם שְׁאֹֽל׃ (ס)
Tu also nach deiner Weisheit und lass seinen Hoarkopf nicht in Frieden zum Grab hinabsteigen.
Rashi on I Kings
And do not let his greying head go down to the grave in peace. Do not let him die a natural death [causing him] to fall into Gehinnom.6Dovid had Yoav’s ultimate welfare in mind.