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.
How David Became King. King Saul became more and more jealous of David. Again he threw a spear at David, trying to kill him. Then he sent some men to David's house to kill him. David escaped and his wife Michal put a statue in his bed to fool the men while he got away.