Proverbs 21:13
"Whoso stoppeth his ears at the cry of the poor, he also shall cry himself, but shall not be heard."
Cross References (ranked by relevance)
He that giveth unto the poor shall not lack: but he that hideth his eyes shall have many a curse.
For if ye forgive men their trespasses, your heavenly Father will also forgive you:
Then shall they call upon me, but I will not answer; they shall seek me early, but they shall not find me:
For with what judgment ye judge, ye shall be judged: and with what measure ye mete, it shall be measured to you again.
They cried, but there was none to save them: even unto the LORD, but he answered them not.
Their poison is like the poison of a serpent: they are like the deaf adder that stoppeth her ear;
Then they cried out with a loud voice, and stopped their ears, and ran upon him with one accord,