גופא מניין לרואה את חברו שהוא טובע בנהר או חיה גוררתו או לסטין באין עליו שהוא חייב להצילו ת"ל לא תעמוד על דם רעך והא מהכא נפקא מהתם נפקא אבדת גופו מניין ת"ל והשבותו לו אי מהתם הוה אמינא ה"מ בנפשיה אבל מיטרח ומיגר אגורי אימא לא קמ"ל
[To revert to] the above text: 'Whence do we know that if a man sees his neighbour drowning, mauled by beasts, or attacked by robbers, he is bound to save him? From the verse, "Thou shalt not stand by the blood of thy neighbour." (Lev. 19:16). But is it derived from this verse? Is it not rather from elsewhere? Viz., Whence do we know [that one must save his neighbour from] the loss of himself? From the verse, "And thou shalt restore him to himself!" (Deut. 22:2) — From that verse I might think that it is only a personal obligation, but that he is not bound to take the trouble of hiring men [if he cannot deliver him himself]: therefore, this verse teaches that he must.
לפיכך נברא אדם יחידי, ללמדך, שכל המאבד נפש אחת מישראל, מעלה עליו הכתוב כאלו אבד עולם מלא.
...It was for this reason that man was first created as one person (viz. Adam), to teach you that anyone who destroys a life (some editions: from Israel) is considered by Scripture to have destroyed an entire world; any any who saves a life (some editions: from Israel) is as if he saved an entire world."
ת"ר מפרנסים עניי נכרים עם עניי ישראל ומבקרין חולי נכרים עם חולי ישראל וקוברין מתי נכרים עם מתי ישראל מפני דרכי שלום:
We must provide help for the non-Jewish poor as well as for the Jewish poor; we must visit non-Jews when they are sick as well as our fellow Jews when they are sick; and we must attend to the burial of their dead as well as the burial of our own dead; for these are the ways of peace.
"Just as he clothes the naked, as it is written, 'And the Lord G-d made for Adam and his wife cloaks of leather, and he clothed them (Genesis 3:21);' so too you shall clothe the naked. The Holy One, Blessed be He, visited the sick, as it is written, 'And he appeared in Ailonei Mamrei [while Abraam was in pain] (Genesis 18:1);' so too you shall visit the sick. The Holy One, Blessed be He, comforted mourners, as it is written, 'And it was, after the death of Abraham, and G-d blessed his son Isaac (Genesis 25:11);' so too you shall comfort mourners. The Holy One, Blessed be He, buried the dead, as it is written, 'And he buried him in the valley (Deuteronomy 34:6);' so too, you shall bury the dead."