And it happened in the fifth year of King Rehoboam that Shishak king of Egypt came up against Jerusalem, because they had transgressed against the LORD,
2 Chronicles 12:2
Surrounding context
12:1 Now it came to pass, when Rehoboam had established the kingdom and had strengthened himself, that he forsook the law of the LORD, and all Israel along with him.
12:2 And it happened in the fifth year of King Rehoboam that Shishak king of Egypt came up against Jerusalem, because they had transgressed against the LORD,
12:3 with twelve hundred chariots, sixty thousand horsemen, and people without number who came with him out of Egypt--the Lubim and the Sukkiim and the Ethiopians.