LEV12 You have no right to harm others in your efforts to fulfill a mitzvah. Rashi cites the Midrash which explains that the term adam is used in this verse to denote man rather than the term ish in order to teach us a principle. Just as the first man (Adam) did not bring an offering from anything that was stolen, since everything was his, so too, should you not bring an offering from that which is stolen. (Yayikra Rabbah 2:6). While staying at a certain inn during his travels, Rabbi Yisroel Salanter used only a minimal amount of water to wash his hands before eating. "You can use as much water as you want," the innkeeper told Rabbi Salanter. "We have a maid who brings it from the well." "To bring water from the well, your maid has to carry heavy pails over steep hill," replied Rav Yisroel. "It's not proper for me to cause her excessive work even if the water will be used for a mitzvah." (Chayai Hamussar, vol. 1, p. 50).