Avraham Chaim Naeh was a Lubavitcher chassid and posek

Posek

Posek is the term in Jewish law for "decider"—a legal scholar who decides the Halakha in cases of law where previous authorities are inconclusive or in those situations where no halakhic precedent exists....

(halachic authority), most famous for his works Ketzos ha-Shulchan , Shiurei Mikveh, and Shiurei Torah, (Measurements of the Torah), in which he converted biblical measurement

Measurement

Measurement is the process or the result of determining the ratio of a physical quantity, such as a length, time, temperature etc., to a unit of measurement, such as the metre, second or degree Celsius...

s into contemporary measurements. The work is of significance as much of Jewish law involves specific requirements of certain sizes and quantities.

Naeh was born in Hebron

Hebron

Hebron , is located in the southern West Bank, south of Jerusalem. Nestled in the Judean Mountains, it lies 930 meters above sea level. It is the largest city in the West Bank and home to around 165,000 Palestinians, and over 500 Jewish settlers concentrated in and around the old quarter...

, Palestine

Palestine

Palestine is a conventional name, among others, used to describe the geographic region between the Mediterranean Sea and the Jordan River, and various adjoining lands....

. His father, Rabbi Menachem Mendel Naeh, was the dean of the Magen Avos Yeshiva, founded by the Sdei Chemed. He studied in his youth at the Ohel Moshe Yeshiva, under Rabbi Yitzchak Yerucham Diskin

Yehoshua Leib Diskin

Yehoshua Yehuda Leib Diskin , also known as the Maharil Diskin, was a leading rabbi, Talmudist and Biblical commentator. He served as a rabbi in Łomża, Mezritch, Kovno, Shklov, Brisk and finally Jerusalem, after moving to Eretz Yisrael in 1878....

. In 1912, Naeh published Chanoch la-Noar, a book containing laws for bar mitzvah boys.

When World War I broke out, the Ottoman authorities expelled people from Palestine who did not possess Turkish citizenship. Many of the dispossessed Jews found refuge in Alexandria

Alexandria

Alexandria is the second-largest city of Egypt, with a population of 4.1 million, extending about along the coast of the Mediterranean Sea in the north central part of the country; it is also the largest city lying directly on the Mediterranean coast. It is Egypt's largest seaport, serving...

, Egypt, where Naeh opened a yeshiva

Yeshiva

Yeshiva is a Jewish educational institution that focuses on the study of traditional religious texts, primarily the Talmud and Torah study. Study is usually done through daily shiurim and in study pairs called chavrutas...

 called "Yeshivat Eretz Yisrael". His yeshivah had 200 students who had been exiled from Jerusalem. In Alexandria, Naeh wrote Shenot Chaim, a special Kitzur Shulchan Aruch

Kitzur Shulchan Aruch

Kitzur Shulchan Aruch may refer to:#The famous work of that name by Shlomo Ganzfried#A similar Sephardi work entitled "Kitzur Shulchan Aruch" by Rabbi Raphael Baruch Toledano....

for Sephardic Jews. In 1918, he returned to Palestine and served as the personal secretary of the Edah HaChareidis, under Rabbi Yosef Chaim Sonnenfeld

Yosef Chaim Sonnenfeld

Yosef Chaim Sonnenfeld, also spelled Zonnenfeld, was the Chief Rabbi and co-founder of the Edah HaChareidis, Haredi Jewish community in Jerusalem, during the years of the British Mandate of Palestine. He was originally given the name "Chaim", however, the name "Yosef" was added to him while he...

. In 1948, he founded the Vaad ha-Rabbanim of Agudas Yisrael and later helped found the hareidi weekly newspapers, Kol Yisrael and HaModia

Hamodia

Hamodia is a Hebrew language daily newspaper, published in Jerusalem, Israel. A daily English language edition is also published in the United States, and weekly English-language editions in England and Israel. A weekly edition for French readers debuted in 2008. The U.S. version is the first...

.