Musnad Abu Ya'la al-Mawsili 65:13

Narrated to us Ishaq, narrated to us Salim ibn Nuh, from Yunus, from al-Hasan: "And when you are greeted with a greeting, then greet with one better than it" (refers to) the women of the people of Islam, or return it (the greeting) to the people of polytheism.