Former Chief Ashkenazic Rabbi of Israel, Rabbi Yisrael Meir Lau, mourned, Tuesday morning, the passing of Rabbi Yehoshua Neuwirth, the author Shemirath Shabbath, the definitive work on observing the Sabbath. Interviewed by Arutz Sheva, he said he met his fellow Holocaust survivor 63-years ago at the Kol Torah yeshiva and remembered Rabbi Neuwirth as "a great teacher, devoted friend, a modest man and, what is less known, he was an extremely charitable man, he had enjoyed gamachim (charity operations) which benefitted thousands of individuals and families. "
Regarding Shemirath Shabbath (Shemirath Shabbat Kehilkhata as it is known in the original Hebrew), Rabbi Lau noted that eminent halakhic (Jewish legal) authority Rabbi Shlomo Zalman Auerbach went through all the laws and only after Rabbi Auerbach checked it was it written in the book. Rabbi Lau said, "It's not just the consent of a great rabbi who wrote, flicking through the pages of the book, but he went over each and every law and said yes. Rabbi Neuwirth, in his own right, became the greatest arbiter of laws of the Sabbath in this generation."