Muhammad.com collection in 109 languages

We are all Muslims, first and last. You may follow one school of
thought, and I may follow another. You may be making the way
straight and easy, and I may be drooping in the way, but we
should not be divided in our faith as long as we have faith in Allah
and want peace with each other.

The Holy Qur'an says, "And when you are greeted with a
greeting, greet with one better than it, or return it. Surely Allah
ever takes account of all things."105 If you say to me, "As-salaam
'alaykum, brother (Peace be unto you, brother)," I will say, "Wa
'alaykum as-salaam wa rahmatullahi wa barakatuh (And on you
be peace, and the Mercy of Allah and His Blessings)." The next
time I say, "As-salaam 'alaykum," you should say, "Wa 'alaykum
as-salaam wa rahmatullahi wa barakatuh." If someone says,
"Good morning, sir," you should say, "Good morning to you, sir,
and may God bless you." We must compete to see which of us can
be better towards the other. This is the spirit of competition Allah
intends for Muslims. We are not to try to tear each other down.