'Joints' in the Bible

A certain man drew his bow at random, and struck the king of Israel between the joints of the armor. Therefore he said to the driver of his chariot, "Turn your hand, and carry me out of the battle; for I am severely wounded."

A certain man drew his bow at random, and struck the king of Israel between the joints of the armor. Therefore he said to the driver of the chariot, "Turn your hand, and carry me out of the army; for I am severely wounded."

Then the king's face was changed in him, and his thoughts troubled him; and the joints of his thighs were loosened, and his knees struck one against another.

and not holding firmly to the Head, from whom all the body, being supplied and knit together through the joints and ligaments, grows with God's growth.

For the word of God is living, and active, and sharper than any two-edged sword, and piercing even to the dividing of soul and spirit, of both joints and marrow, and is able to discern the thoughts and intentions of the heart.