Rav Avrohom Dov of Avritch, the author of Bas Ayin, once heard a Misnagged speaking out against the Rav’s Rebbe, the Berditchever. The Avritcher defended the Berditchever’s honor and protested loudly and strongly against that opponent of Chassidus. The Misnagged (who was also a Rav) threatened that if the Avritcher would not apologize, he would never have children!
The Avritcher answered, “Even so, I will not apologize, since my Rebbe’s honor is at stake.”
He did not apologize (and he never had any children). Ma’amar Mordechai 6.