New Revised Standard Version
His son Jehoshaphat succeeded him, and strengthened himself against Israel.

Contemporary English Version
Jehoshaphat son of Asa became king and strengthened his defenses against Israel.

New American Bible
His son Jehoshaphat succeeded him as king and strengthened his position against Israel.

Douay-Rheims Bible
And Josaphat his son reigned in his stead, and grew strong against Israel.

And Josaphat his son reigned in his stead, and grew strong against Israel.

Jehoshaphat

1 Kings 15:24 And he slept with his fathers, and was buried with them in the city of David, his father. And Josaphat, his son, reigned in his place.

1 Kings 22:41 But Josaphat, the son of Asa, began to reign over Juda, in the fourth year of Acbab, king of Israel.

1 Chronicles 11:10 These are the chief of the valiant man of David, who helped him to be made king over all Israel, according to the word of the Lord, which he spoke to Israel.

Matthew 1:8 And Asa begot Josaphat. And Josaphat begot Joram. And Joram begot Ozias.

Josaphat

2 Chronicles 12:1 And when the kingdom of Roboam was strengthened and fortified, he forsook the law of the Lord, and all Israel with him.

2 Chronicles 26:8 And the Ammonites gave gifts to Ozias: and his name was spread abroad even to the entrance of Egypt for his frequent victories.

2 Chronicles 32:5 He built up also with great diligence all the wall that had been broken down, and built towers upon it, and another wall without: and he repaired Mello in the city of David, and made all sorts of arms and shields:

1 Samuel 23:16 And Jonathan, the son of Saul, arose, and went to David, into the wood, and strengthened his hands in God: and he said to him:

Ephesians 6:10 Finally, brethren, be strengthened in the Lord and in the might of his power.