Saying May God Bless you

Recently I encounter a situation where one of my close people and I went see a patient. While we were about to leave the place, my close person said **May God Bless you**. Me and my close person are both Buddhist. I asked why didn't you say May the triple gem bless you. And close person replied saying since they Christians I said God bless you. But I also observed that the patients people said **May God bless you**. Does saying **May God bless you** comes under a wrong view or wrong speech or etc or is it okay to tell? I'm just curious to know since my close person is also a Buddhist"