2 Chron. 29:29-30 - King Hezekiah and the assembly venerate the altar by Bowing down in worship before the sin offerings.
Chronicles 29:
27 "Hezekiah gave the order to sacrifice the burnt offering on the altar. As the offering began, singing to the LORD began also, accompanied by trumpets and the instruments of David king of Israel. 28 The whole assembly BOWED in worship, while the musicians played and the trumpets sounded. All this continued until the sacrifice of the burnt offering was completed.
29 When the offerings were finished, the king and everyone present with him KNELT down and worshiped. 30 King Hezekiah and his officials ordered the Levites to praise the LORD with the words of David and of Asaph the seer. So they sang praises with gladness and bowed down and worshiped.
31 Then Hezekiah said, “You have now dedicated yourselves to the LORD. Come and bring sacrifices and thank offerings to the temple of the LORD.” So the assembly brought sacrifices and thank offerings, and all whose hearts were willing brought burnt offerings."
If you are going to say:" Well they were bowing to the Lord not the Ark. That is what Real Catholics Believe also in veneration of icons.
Psalm 138:2 - David bows down before God's Holy Temple.
Psalm 138:2
2 I will BOW down toward your holy temple and will praise your name
for your unfailing love and your faithfulness, for you have so exalted your solemn decree that it surpasses your fame.