One should not distinguish between Lord Shiva and Lord Vishnu

आवयोर्भेदकर्ता यः स नरो नरकं व्रजेत् |

इहापि प्राप्नुयात्कष्टं पुत्रपौत्रविवर्जितः || 42 ||

 

A man who makes a distinction between two of us goes to hell. He also gets suffering here (on earth), and will not have sons or grandsons.