Malbim Ayelet HaShachar Klal 351
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.
פעל כפר לר' אברהם בן עזרא גזירתו משם 'כופר' המורה פדיון. ולחז"ל הוא מענין נקיות. (ויקרא סימן לב).
Ayelet Hashachar, translated by Betzalel Avraham Feinstein, 2021
The verb כפר (atone) is, according to Rabbi Abraham ibn Ezra, derived from the noun כופר (ransom), which teaches redemption. And according to the sages of blessed memory, it comes from the topic of cleanliness.