Bible Dictionaries
Reins

Webster's Dictionary

(1):

(n. pl.) The kidneys; also, the region of the kidneys; the loins.

(2):

(n. pl.) The inward impulses; the affections and passions; - so called because formerly supposed to have their seat in the part of the body where the kidneys are.

Bibliography Information
Webster, Noah. Entry for 'Reins'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​r/reins.html. 1828.