Sefer Ohel Avrohom relates the following story about Rav Avrohom Abish zt”l, the Rov of Frankfort, in the name of his grandfather, Rav Menachem Mendel of Kotzk zy”a:
Before becoming Rov of Frankfort, Rav Avrohom Abish served as Rov of the city of Kariv. He greatly valued the honor of sandaka’us. Whenever it was offered to him, he would travel to wherever the bris was being held to accept the kibud. On one trip, the road passed by a Christian house of prayer. Since it was their holiday, it was dangerous for Jews to pass by at that time. The wagon driver wanted to drive around the village but that would mean leading the horses through mud and rocks, which could cause them a lot of pain.
Rav Avrohom Abish told the driver, “Wait 15 minutes. Then a fire will break out in the church. They will be busy putting it out and we’ll be able to ride by without being noticed.”
And that’s exactly what happened.
The wagon driver asked the Rov how he knew this would happen. Did he have ruach hakodesh? Rav Abish answered, “No. I am not a Navi. Rather, since I never say an untruth, even when I’m in a tough situation, sometimes my words are accepted in Shomayim. And even if I say things that sound unusual, min hashamayim my words are fulfilled... And you could do this too if you are careful with your words.”
