The way I look at these situations is like this: Everything we have (money, time, ability, knowledge, talent, etc.) belongs to God and he blesses us with these things. When the friend asked you to do this you were blessed with everything needed to help the man, used those blessings that God gave gave you to do so and in turn through you God blessed your friend. You done right by God and your friend. According to the Bible when we take God's blessing and use them he gives us more because He knows we are good stewards. Some who don't know call it karma, they recognize the blessings but don't know the Blesser!