Kings III 2:9

9 But thou shalt by no means hold him guiltless, for thou art a wise man, and wilt know what thou shalt do to him, and shalt bring down his grey hairs with blood to the grave.

Kings III 2:9 In-Context

7 But thou shalt deal kindly with the sons of Berzelli the Galaadite, and they shall be among those that eat at thy table; for thus they drew nigh to me when I fled from the face of thy brother Abessalom.
8 And, behold, with thee Semei the son of Gera, a Benjamite of Baurim: and he cursed me with a grievous curse in the day when I went into the camp; and he came down to Jordan to meet me, and I swore to him by the Lord, saying, I will not put thee to death with the sword.
9 But thou shalt by no means hold him guiltless, for thou art a wise man, and wilt know what thou shalt do to him, and shalt bring down his grey hairs with blood to the grave.
10 And David slept with his fathers, and was buried in the city of David.
11 And the days which David reigned over Israel forty years; he reigned seven years in Chebron, and thirty-three years in Jerusalem.

The Brenton translation of the Septuagint is in the public domain.