1 Kings 2:4-6

Young's Literal Translation

⁴ so that Jehovah doth establish His word which He spake unto me, saying, If thy sons observe their way to walk before Me in truth, with all their heart, and with all their soul; saying, There is not cut off a man of thine from the throne of Israel.

⁵ `And also, thou hast known that which he did to me -- Joab son of Zeruiah -- that which he did to two heads of the hosts of Israel, to Abner son of Ner, and to Amasa son of Jether -- that he slayeth them, and maketh the blood of war in peace, and putteth the blood of war in his girdle, that [is] on his loins, and in his sandals that [are] on his feet;

⁶ and thou hast done according to thy wisdom, and dost not let his old age go down in peace to Sheol.