[2] In 1903, Rabbi Sher married Maryasha Gittel Finkel, a daughter of the Alter of Slabodka.

The couple moved to Kelmė where he developed a close relationship with Rabbi Simcha Zissel Ziv (the Alter of Kelm).

[3] He studied for a short time in the Mir Yeshiva, which was led by his wife's brother, Rabbi Eliezer Yehudah Finkel.

[4] It was during Rabbi Sher's time as rosh kollel that he began writing his sefer, Beis Yisrael.

[3] Shortly before the outbreak of World War II, Rabbi Sher, who was in poor health, had gone to a spa in Switzerland, and was therefore spared from the Nazi killings that left thousands murdered in Kaunas and Slabodka, including Rabbi Grodzinski and the students of the yeshiva.

[2] His grandson-in-law is Rabbi Moshe Hillel Hirsch, current Slabodka rosh yeshiva in Bnei Brak.