'Altar' in the Bible

"If therefore you are offering your gift at the altar, and there remember that your brother has anything against you,

leave your gift there before the altar, and go your way. First be reconciled to your brother, and then come and offer your gift.

'Whoever swears by the altar, it is nothing; but whoever swears by the gift that is on it, he is obligated?'

You blind fools! For which is greater, the gift, or the altar that sanctifies the gift?

He therefore who swears by the altar, swears by it, and by everything on it.

that on you may come all the righteous blood shed on the earth, from the blood of righteous Abel to the blood of Zachariah son of Barachiah, whom you killed between the sanctuary and the altar.