Gold

Fools and blind! For which is greater, the gold or the temple that sanctifies[a] the gold? Mathew 23.17

The Lord asked the hypocrites but why?

Because they considered the offering more important than the Altar, which was the one that sanctified it. Unfortunately, this has been the attitude of many spiritually weak and sick Christian... in fact, some have even died. They were more attentive to what they left on the Altar than Who was receiving their offerings.