Teshuvot Maharam, Berlin Edition, Part III
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.
וששאלת על ראובן ששכר את שמעון ללמדו אומנות בעלי תריסין וכשלמד יום א' חזר בו נותן לו כל שכרו כפועל בטל דל"ש אומנות דפעולה משאר אומנות וכמה פעמים שאומנות זו יש בה הצלת נפשות כשבאים לסטים על האדם.
Rabbi Meir of Rothenburg, his life and his works, by Irving A. Agus. Philadelphia, 1947
Q. A hired B to teach him the gladiatorial art. After learning for a day, however, A changed his mind and refused to continue his studies. A. A must pay B the wages of an "idle worker", for a skill is as important as a handicraft. Moreover, this particular skill may often save a person's life, as in case one is attacked by robbers. SOURCES: B. P. 285, no. 335.