Bismillah Walhamdulillah Was Salaatu Was Salaam ‘ala Rasulillah

As-Salaam Alaikum Wa-Rahmatullahi Wa-Barakatuhu

Narrated by Abu Dhar (Radhiallaho anho):
I asked Allah’s Messenger (sallallaahu ‘alaihi wasallam) , “What is the best deed?” He replied, “To believe in Allah and to fight for His cause.” I then asked, “What is the best kind of manumission (of
slaves)?” He replied, “The manumission of the most expensive slave and the most beloved by his master.” I said, “If I cannot afford to do that?” He said, “Help the weak or do good for a person who cannot work for himself.” I said, “If I cannot do that?” He said, “Refrain from harming others for this will be regarded as a charitable deed for your own good.”
Sahih Al-Bukhari Vol. 3 : No. 694