Teshuvot Maharam, Cremona Edition
Can copy this into an AI, or connect the whole library to your assistant. For deeper learning, you can directly use the original seforim, sites, and apps.
עלהחומץ שנתחמץ בשמרי שכר. יש למוכרו לגוים קודם הפסח ולומ' לו אם תשמרהו עד לאחר הפסח אקנהו ממך או אני או יהודי אחר
Rabbi Meir of Rothenburg, his life and his works, by Irving A. Agus. Philadelphia, 1947
Vinegar that has been mixed with the yeast of beer must be sold to a Gentile before Passover (in order not to violate the commandment of Ex. 12,19 and 13,7, which prohibits a Jew from possessing leaven during the Passover week). The Gentile may be told that if he holds the vinegar until after Passover, a Jew will buy it from him. SOURCES: Cr. 68; Pr. 31; L. 340; Rashba I, 850.