R. Leizer Shimon Tumarkin of Homil (born c. 5595) was the son of R. Yosef Tumarkin, the Rov of Kremenchug, and the grandson-in-law of R. Aizel Homiler. A close talmid of R. Aizel, R. Leizer Shimon was a chasid of the Tzemach Tzedek, Rebbe Maharash, and Rebbe Rashab. He was a prominent figure in the town of Homil and published R. Aizel’s maamarim.

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After the Tzemach Tzedek passed away, R. Leizer Shimon became a chossid of the Rebbe Maharash. Once he asked the Rebbe: “We’re the same age; why do you look so worn out?”

“It’s from the ‘heartwarming’ yechidusen,” the Rebbe replied.

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When R. Leizer Shimon came to Homil to learn by R. Aizel Homiler, he was already fluent in Likkutei Torah. R. Mordechai Yoel Duchman took him as a chavrusa, and they began learning together nigleh and Chassidus.

R. Aizel boasted: “With Mordechai Yoel and Leizer Shimon, I fulfilled the Alter Rebbe’s vision of knei lecha chaver, acquire for yourself a friend.”

R. Aizel once farbrenged on Yud-Tes Kislev with them two and a third person and said, “The four of us correspond to the four letters of Hashem’s Name, Havayeh. Let us resolve to live the right way only, and no other!”

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In 5657, R. Aizel’s grandsons-in-law — R. Leizer Shimon and R. Tzvi Dov (Hersh Ber) Lotker — finished davening on their zeide’s yahrzeit and R. Mordechai Yoel joined them for a LeChaim.

“Nu,” they said, “it’s already forty years. Shouldn’t we have then the wisdom of our teacher?”

“But that’s only if you ‘follow in his ways,’” replied R. Mordechai Yoel.