Luke 14:12
Then Jesus also said to the Pharisee who had invited Him [to dinner], "When you prepare a breakfast or a supper, do not invite your friends, or brothers, or relatives or rich neighbors [only], for maybe they will invite you back, and [then] you will be repaid [for your kindness].
Matthew 6:1-4
"Be careful that you do not do your good deeds in front of people for the purpose of being seen by them, for [if you do] you will not have a reward from your Father in heaven.
Matthew 5:46
For if you love [only] those who love you, what reward will you get for that? Do not even the publicans [Note: These were people with a bad reputation for their dishonest tax collecting activities] do that much?
Matthew 6:16-18
"In addition, when you fast [i.e., go without food and/or drink for religious reasons], do not be like the hypocrites with long faces, for they go around with gloomy expressions on their faces in order to advertise that they are fasting. It is true when I say to you, these people have [already] received their reward.
Luke 1:53
He has filled the hungry with good things and has sent the rich away empty-handed.
Luke 6:32-36
And if you love [only] those who love you, what thanks do you deserve for doing that? For even worldly people love those who love them.
James 2:1-6
My brothers, do not hold [views regarding] the faith of our glorious Lord Jesus Christ [i.e., as tenets of Christianity] which show favoritism toward [certain] persons.