Then the king will say to those on his right, 'Come, you who are
blessed by my Father. Inherit the kingdom prepared for you from the
foundation of the world. For I was hungry and you gave me
food, I was thirsty and you gave me drink, a stranger and you
welcomed me, naked and you clothed me, ill and you cared for me, in
prison and you visited me.' Then the righteous 16 will
answer him and say, 'Lord, when did we see you hungry and feed you,
or thirsty and give you drink? When did we see you a stranger and
welcome you, or naked and clothe you? When did we see you ill or in
prison, and visit you?' And the king will say to them in reply,
'Amen, I say to you, whatever you did for one of these least
brothers of mine, you did for me.' - Mat 25
The quality or what exactly those deeds are self
explnatory.
In terms of quantity, i have no idea. Scripture doesnt say exactly,
though as long as it is enough to save you by the fire according to
St Paul Corinthians.