Hisnul Muslim 225

Excellence of spreading the Islamic greeting

ثلاث من جمعهن فقد جمع الإيمان : الإنصاف من نفسك ، وبذل السلام للعالم ،والإنفاق من الإقتار

There are Three things which whoever gathers all of them together, then he has gathered Iman (Faith): justice with oneself, greeting people with greetings of Salam (peace), and freeing oneself from stinginess.