Dict: strongs - kidneys

Strongs:

H2910 @ טחה ţûchâh too-khaw' From H2909 (or H2902) in the sense of overlaying; (in the plural only) the kidneys (as being covered); hence (figuratively) the inmost thought: - inward parts.

H3629 @ כּליה kilyâh kil-yaw' Feminine of H3627 (only in the plural); a kidney (as an essential organ); figuratively the mind (as the interior self): - {kidneys} reins.