 Goldfarb was a talented musician , known to this day as composer of popular tunes for the songs " Shalom Aleichem " and " Magein Avot " used in most Ashkenazi synagogues . With his brother Samuel E. Goldfarb , he compiled The Jewish Songster for schoolchildren , the first American collection of Jewish songs . Israel Goldfarb also served as Professor of Liturgical Music at the Jewish Theological Seminary from 1920 to 1944 , and in 1949 founded the School of Sacred Music at Hebrew Union College . 
