In 1707 in Berlin, he married Miriam, the oldest daughter of Tzvi Ashkenazi, then rabbi in Altona, and continued his studies under his father-in-law, with whom he went to Amsterdam and Poland.
[1] Through the influence of his relatives he then obtained the rabbinical position in Tarnopol in 1718 or 1720,[1] the former incumbent having been ousted by the officials of the government to open a space for him.
This interference on the part of the civic authorities naturally aroused great opposition to him in the congregation, and Aryeh Leib was deposed in 1724.
[citation needed] He took an active part in the controversy between Jacob Emden and Jonathan Eybeschütz, and sided with the former, who was his wife's brother.
Aryeh signs as residing from Glogau, supervising the congregation in Lviv and ready to serve in Amsterdam, where he was appointed but apparently did not yet live.