You might have seen a pain scale in your doctor's office before. One common type shows a series of numbered cartoon faces moving from 0 (smiling and pain-free) to 10 (weeping in agony.) A doctor would ask a person in pain which face matched up with what they were feeling. They might seem simple.
In our day this might be more than one. For Israelite King Echov, one particular foreign wife, Isabel, was one too many. King David is said to have had eighteen wives and concubines, seven mentioned by name in the OT and the others mentioned in the oral tradition.
Before David dies, he appoints as king his son Solomon, who is 12 years old at the time, with these words: I go the way of all the earth. You shall be strong, therefore, and show yourself a man, and keep the charge of the Lord your God to walk in His ways, to keep His statutes and His commandments and His testimonies.