Bible Verses About Selfishness: Performing duty for reward

And that he died for all, that they which live should not henceforth live unto themselves, but unto him which died for them, and rose again.

For ye know the grace of our Lord Jesus Christ, that, though he was rich, yet for your sakes he became poor, that ye through his poverty might be rich.

Thou shalt not avenge, nor bear any grudge against the children of thy people, but thou shalt love thy neighbour as thyself: I am the LORD.

Bear ye one another's burdens, and so fulfil the law of Christ.

And the second is like unto it, Thou shalt love thy neighbour as thyself.