Now King Solomon loved many foreign women. Besides Pharaoh's daughter, he married women from Moab, Ammon, Edom, Sidon, and from among the Hittites.
The LORD had clearly instructed his people not to intermarry with those nations, because the women they married would lead them to worship their gods. Yet Solomon insisted on loving them anyway.
He had seven hundred wives and three hundred concubines. And sure enough, they led his heart away from the LORD.
In Solomon's old age, they turned his heart to worship their gods instead of trusting only in the LORD his God, as his father, David, had done.
Solomon worshiped Ashtoreth, the goddess of the Sidonians, and Molech, the detestable god of the Ammonites.
References for 1 Kings 11:5
Thus, Solomon did what was evil in the LORD's sight; he refused to follow the LORD completely, as his father, David, had done.
On the Mount of Olives, east of Jerusalem, he even built a shrine for Chemosh, the detestable god of Moab, and another for Molech, the detestable god of the Ammonites.
Solomon built such shrines for all his foreign wives to use for burning incense and sacrificing to their gods.
The LORD was very angry with Solomon, for his heart had turned away from the LORD, the God of Israel, who had appeared to him twice.
He had warned Solomon specifically about worshiping other gods, but Solomon did not listen to the LORD's command.
So now the LORD said to him, "Since you have not kept my covenant and have disobeyed my laws, I will surely tear the kingdom away from you and give it to one of your servants.
But for the sake of your father, David, I will not do this while you are still alive. I will take the kingdom away from your son.
And even so, I will let him be king of one tribe, for the sake of my servant David and for the sake of Jerusalem, my chosen city."