[א] "בהק…טהור" – מלמד שבהק טהור. יכול לא יטמא משום אום אבל יטמא משום פשיון? ת"ל הפורח טהור. יכול יטהר את הבהרת שיצאת ממנו? ת"ל "הוא". יכול לא יטהר את הבהרת שיצאת ממנו אבל יטהר את הבהרת שנסמך לה? ת"ל "בהק הוא טהור הוא" – הוא טהור ואין בהרת שיצאת ממנו ושנסמך לה טהורה אלא טמאה
1) (Vayikra 13:39) ("Then the Cohein shall see, and, behold, if in the skin of their flesh there are dim white bright spots, it is bohak (white scurf) that has blossomed in the skin; it is clean.") "it is bohak … it is clean": This teaches us that bohak is clean (and does not require quarantine). I might think that it does not confer tumah through its source, but it does confer tumah by spreading; it is, therefore, written "that has blossomed (i.e., spread) in the skin; it is clean." I might think that it renders clean a bahereth that issued from it; it is, therefore, written "it" (bohak, is clean, but not a bahereth that issues from it). I might think that it does not render clean a bahereth that issues from it, but it does render clean a bahereth that is adjacent to it; it is, therefore, written "it is clean" but a bahereth or a spreading that either issues from it or is adjacent to it is not clean.
[א] "בהק…טהור" – מלמד שבהק טהור. יכול לא יטמא משום אום אבל יטמא משום פשיון? ת"ל הפורח טהור. יכול יטהר את הבהרת שיצאת ממנו? ת"ל "הוא". יכול לא יטהר את הבהרת שיצאת ממנו אבל יטהר את הבהרת שנסמך לה? ת"ל "בהק הוא טהור הוא" – הוא טהור ואין בהרת שיצאת ממנו ושנסמך לה טהורה אלא טמאה
1) (Vayikra 13:39) ("Then the Cohein shall see, and, behold, if in the skin of their flesh there are dim white bright spots, it is bohak (white scurf) that has blossomed in the skin; it is clean.") "it is bohak … it is clean": This teaches us that bohak is clean (and does not require quarantine). I might think that it does not confer tumah through its source, but it does confer tumah by spreading; it is, therefore, written "that has blossomed (i.e., spread) in the skin; it is clean." I might think that it renders clean a bahereth that issued from it; it is, therefore, written "it" (bohak, is clean, but not a bahereth that issues from it). I might think that it does not render clean a bahereth that issues from it, but it does render clean a bahereth that is adjacent to it; it is, therefore, written "it is clean" but a bahereth or a spreading that either issues from it or is adjacent to it is not clean.