Exodus 21:10
If a man takes a second wife, he must continue to give his first wife the same amount of food and clothing and the same rights that she had before.
1 Corinthians 7:1-6
Concerning the things that you wrote to me: It is good for a man not to touch (have sex with) a woman.
Treasury of Scripture Knowledge
Summary
                            If he take him another wife; her food, her raiment, and her duty of marriage, shall he not diminish.                        
                    Her food
General references
Bible References
Her food
                                        1 Corinthians 7:1                                        
                                                            
                        Concerning the things that you wrote to me: It is good for a man not to touch (have sex with) a woman.
                                    General references
                                        1 Corinthians 7:3                                        
                                                            
                        Let the husband fulfill his marital duties to his wife and also the wife to her husband.