(Asshuara’) 26 : 16
فَأْتِيَا فِرْعَوْنَ فَقُولَا إِنَّا رَسُولُ رَبِّ الْعَالَمِينَ
"Both of you go to Pharaoh, and say: “Indeed we are the Messenger from Lord of all worlds”.
Instead of saying “we are the Messengers” it is said, “we are the Messenger”. That means the Lord wants both of them to talk one Message.