2 Kings 11:2

They hid — Jehosheba and her husband Jehoiada. Bed — chamber — Which was in the house of the Lord. So that it was one of those chambers adjoining to the temple, that were for the uses of the priests and Levites only: which made it more proper for this purpose. Now was the promise made to David bound up in one life. And yet it did not fail. Thus to the Son of David will God, according to his promise, secure a spiritual seed: which tho' sometimes reduced to a small number, brought very low, and seemingly lost, yet will be preserved to the end of time. It was a special providence that Joram tho' a king, a wicked king, married his daughter to Jehoiada, a priest, an holy priest. This some might think a disparagement to the royal family; but it saved the royal family from ruin. For Jehoiada's interest in the temple, gave her an opportunity to preserve the child: and her interest in the royal family, gave him an opportunity of setting him on the throne. See what blessings they lay up in store for their families who marry their children to those that are wise and good.