Therefore, ehrliche yidden in every generation would distance themselves greatly from any hint of discord. A story is told about R' Aharon Kohen, the son-in-law of the Chofetz Chaim. He moved to Eretz Yisroel from Europe, and settled in the neighborhood of Shaarei Chesed. The residents were overjoyed to have such a distinguished Talmid Chochem in their midst, and they honored him, trying to fill his needs to the best of their ability. One day the residents noticed that R' Aharon was no longer in town. They researched his whereabouts, until they discovered that he had moved to the city of Yaffo which also had a sizable virtuous population. They approached him, asking why he had left their area where he was so greatly missed.
R' Aharon explained that before he moved to Eretz Yisroel he asked his holy father-in-law, the Chofetz Chaim, where he should choose to reside. The Chofetz Chaim advised him to move to any city where frum Yidden live. However, if he notices even a hint of machlokes, he should relocate immediately. He made him give a binding promise בתקיעת כף, (a handshake as seal of agreement wich is halachikly extremely binding, see שו״ע יו״ד רלט ס״ב) with complete sincerity, that if he were to encounter any strife he would promptly move away. R' Aharon then explained to the Shaarei Chesed crowd that he had noticed that there were some issues regarding who will be the gabbai, the custodian of the shul. He feared that it may lead to machlokes, and he had made a binding promise to flee from any fighting. Thus, he had no choice but to immediately depart from the city.