Foundation — At the east gate, so called because it stood lower than the rest of the doors at the foot of the steps, by which they went up from the king's house to the temple.
Related Commentaries of 2 Chronicles 23:5
2 Chronicles 23:5
5 And a third part shall be at the king's house; and a third part at the gate of the foundation: and all the people shall be in the courts of the house of the LORD.