Treasury of Scripture Knowledge
Summary
                            And Rehoboam loved Maachah the daughter of Absalom above all his wives and his concubines: (for he took eighteen wives, and threescore concubines; and begat twenty and eight sons, and threescore daughters.)                        
                    Eighteen wives
General references
Bible References
Eighteen wives
                                        2 Chronicles 11:23                                        
                                                                                                                                And he dealt wisely, and dispersed of all his sons throughout all the lands of Judah and Benjamin, unto every fortified city: and he gave them victuals in abundance. And he sought for them many wives.
                                    
                                        Deuteronomy 17:17                                        
                                                                                                                                Neither shall he multiply wives to himself, that his heart turn not away: neither shall he greatly multiply to himself silver and gold.
                                    
                                        Judges 8:30                                        
                                                                                                                                And Gideon had threescore and ten sons of his body begotten; for he had many wives.
                                    
                                        2 Samuel 3:2                                        
                                                                                                                                And unto David were sons born in Hebron: and his first-born was Amnon, of Ahinoam the Jezreelitess;
                                    
                                        2 Samuel 5:13                                        
                                                                                                                                And David took him more concubines and wives out of Jerusalem, after he was come from Hebron; and there were yet sons and daughters born to David.
                                    
                                        1 Kings 11:3                                        
                                                                                                                                And he had seven hundred wives, princesses, and three hundred concubines; and his wives turned away his heart.
                                    
                                        1 Chronicles 3:1                                        
                                                                                                                                Now these were the sons of David, that were born unto him in Hebron: the first-born, Amnon, of Ahinoam the Jezreelitess; the second, Daniel, of Abigail the Carmelitess;
                                    
                                        Song of Songs 6:8                                        
                                                            
                        There are threescore queens, and fourscore concubines, And virgins without number.
                                    General references
                                        Deuteronomy 21:16                                        
                                                                                                                                then it shall be, in the day that he causeth his sons to inherit that which he hath, that he may not make the son of the beloved the first-born before the son of the hated, who is the first-born:
                                    
                                        2 Samuel 5:13                                        
                                                                                                                                And David took him more concubines and wives out of Jerusalem, after he was come from Hebron; and there were yet sons and daughters born to David.
                                    
                                        Song of Songs 6:8                                        
                                                            
                        There are threescore queens, and fourscore concubines, And virgins without number.