At the start, before Solomon has asked God for wisdom (I Kings 3:9), he went and got married 

I Kings 3:1

“Solomon made an alliance with Pharaoh king of Egypt by marrying Pharaoh’s daughter. Solomon brought her to live in the city of David until he finished building his palace, the Lord’s temple, and the wall surrounding Jerusalem.”

There was no dating and courting in this relationship. This had nothing to do with love and fidelity, this was worldly wisdom. Solomon did not marry a Hebrew woman who loved the one true God with all her heart, but instead chose a political and strategic alliance. It seemed to work as Egypt became a trading partner with Israel (I Kings 10:28). 

Solomon chose to ignore David’s charge to him…

I Kings 2:1-3

“When David’s time to die drew near, he charged Solomon his son, saying, “I am about to go the way of all the earth. Be strong, and show yourself a man, and keep the charge of the Lord your God, walk in his ways and keep his statutes;”

Now the Law of Moses was very clear regarding marriage:

Deuteronomy 7:1,3-4

“When the Lord your God brings you into the land that you are entering to take possession of it…..Do not intermarry with them. Do not give your daughters to their sons or take their daughters for your sons, for they will turn your children away from following me to serve other gods.”

*Reflection. David’s lousy role model did not help and here is Solomon making a very poor decision that will ultimately impact the nation of Israel forever.