Kings IV 8:19

19 But the Lord would not destroy Juda for David his servant's sake, as he said he would give a light to him and to his sons continually.

Kings IV 8:19 In-Context

17 Thirty and two years old was he when he began to reign, and he reigned eight years in Jerusalem.
18 And he walked in the way of the kings of Israel, as did the house of Achaab; for the daughter of Achaab was his wife: and he did that which was evil in the sight of the Lord.
19 But the Lord would not destroy Juda for David his servant's sake, as he said he would give a light to him and to his sons continually.
20 In his days Edom revolted from under the hand of Juda, and they made a king over themselves.
21 And Joram went up to Sior, and all the chariots that were with him: and it came to pass after he had arisen, that he smote Edom who compassed him about, and the captains of the chariots; and the people fled to their tents.

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