1 Kings 9:25

And three times in a year, apparently on the three chief festivals, Passover, Pentecost, and the Feast of Tabernacles, did Solomon offer burnt offerings and peace-offerings upon the altar which he built unto the Lord; and he burned incense upon the altar that was before the Lord, presenting his meat-offering three times a year, through the priests, as well as his burnt and peace-offering. So he finished the house, it became all that it was designed for and intended to be, a house where men could communicate with Jehovah and enter into fellowship with Him.