Rei Friendly, one who maintained true allegiance to king David (Kg1 1:8) when Adonijah rebelled. Reins The kidneys, the supposed seat of the desires and affections; used metaphorically for "heart." The "reins" and the "heart" are often mentioned together, as denoting the whole moral constitution of man (Psa 7:9; Psa 16:7; Psa 26:2; Psa 139:13; Jer 17:10, etc.). Rekem Embroidered; variegated.