Matthew 10:40-42

40He that receives you receives me, and he that receives me receives him that sent me. 41He that receives a prophet in the name of a prophet, shall receive a prophet's reward; and he that receives a righteous man in the name of a righteous man, shall receive a righteous man's reward. 42And whosoever shall give to drink to one of these little ones a cup of cold [water] only, in the name of a disciple, verily I say unto you, he shall in no wise lose his reward.