2 Chronicles 12:13

So king Rehoboam strengthened himself in Jerusalem, and reigned: for Rehoboam was one and forty years old when he began to reign, and he reigned seventeen years in Jerusalem, the city which the LORD had chosen out of all the tribes of Israel, to put his name there. And his mother's name was Naamah an Ammonitess.

Rehoboam strengthened himself ... and reigned. The Egyptian invasion had been a mere predatory expedition, not extending beyond the limits of Judah and probably, ere long, repelled by the invaded. Rehoboam's government acquired new life and vigour by the general revival of true religion, and his rein continued many years after the departure of Shishak. But "he prepared not his heart to seek the Lord" - i:e., he did not adhere firmly to the good course of reformation he had begun.