Luke 14:12-14 (NIV)
Then Jesus said to his host, "When you give a luncheon or dinner, do not
invite your friends, your brothers or sisters, your relatives, or your rich
neighbors; if you do, they may invite you back and so you will be repaid.
13 But when you give a banquet, invite the poor, the crippled, the lame, the
blind, 14 and you will be blessed. Although they cannot repay you, you will
be repaid at the resurrection of the righteous."