On this page, you can find a few quotes belonging to the last person you would expect. They’re all surprising, but my personal favorite is #7:

#7 Who blocked the marriage of his son and disowned him, commenting:

“How can I, who has always advocated renunciation of sex, encourage you to gratify it?”
(The son subsequently became a homeless alcoholic.)

-Gautama Buddha
-Martin Luther King
-Albert Schweitzer
-Mahatma Gandhi

According to the web page I linked to, which, since it’s on the internet, is an iron-clad source, the person who said this was Mahatma Gandhi, dealing with his son Harilal.

The next time someone asks me why there aren’t more people like Gandhi in the world, I’ll inform them it’s because people like Gandhi don’t pro-create.