Authentic Supplication Number 228.

It is reported by way of Abi Hurayrata that the Messenger of Allah  said: "Do not begin the Jews, or the Cristians with As-Salam, and if you meet one of them in a [tight] path, then compel him to the narrower part of it. (234)"

Footnotes.
(234) A Muslim should have pride in his religion because he ascribes no partners with Allah, and he should not feel inferior to those who do. The practice in the above hadeeth is consistent with this objective. A Muslim, however, may not transgress upon others, or mistreat them.

Reporters.
'Al-`Adawee said it was sound, and that it was reported by Imam Muslim, page 148 of volume 14; 'Abu Dawood, page 384 of volume 5; At-Tirmithi, page 227 of volume 5 of Tuhfah.