Solomon brought Pharaoh’s daughter up from the City of David to the palace he had built for her

2 Chronicles 8:1-18

He rebuilt Upper Beth Horon and Lower Beth Horon as fortified cities, with walls and with gates and bars, as well as Baalath and all his store cities, and all the cities for his chariots and for his horses—whatever he desired to build in Jerusalem, in Lebanon and throughout all the territory he ruled.

There were still people left from the Hittites, Amorites, Perizzites, Hivites and Jebusites (these people were not Israelites). Solomon conscripted the descendants of all these people remaining in the land—whom the Israelites had not destroyed—to serve as slave labor, as it is to this day. 

Solomon brought Pharaoh’s daughter up from the City of David to the palace he had built for her, for he said, “My wife must not live in the palace of David king of Israel, because the places the ark of the Lord has entered are holy.”

And Hiram sent him ships commanded by his own men, sailors who knew the sea. These, with Solomon’s men, sailed to Ophir and brought back four hundred and fifty talents[c] of gold, which they delivered to King Solomon.

Why?

Solomon began his downfall when he brought Pharao's daughter to Israel as his wife. 

The best living environment as Solomon is easy to let people down and think all day the dirty things. 

Rich and long life and peace let a man forget what is right and what is evil.

How?

Be aware of myself, although I am not rich and have labor things, all of this trouble is good to me. Let me don't forget to rely on the Lord.