For I was hungry and you gave Me food: I was thirsty and you gave Me drink. I was a stranger and you took Me in.... I was sick and you visited me;.... Then the righteous will answer Him, saying, Lord, when did we see You hungry and feed You, or thirsty and gave You drink?.... And the King will answer and say to them.

"Assuredly, I say to you, in as much as you did it to one of the least of these My brethren, you did it to me." Mathew 25: 35-40

"Pure religion and undefiled before God and the Father is this, to visit the fatherless and widows in their affliction, and to keep himself unspotted from the world. James 1:27 (KJV)