a memorial

Exodus 28:12, 29
Fasten both stones onto the shoulder pieces of the ephod as memorial stones for the sons of Israel. Aaron is to bear their names on his two shoulders as a memorial before the LORD. . . .

Joshua 4:7
you are to tell them, 'The waters of the Jordan were cut off before the ark of the covenant of the LORD. When it crossed the Jordan, its waters were cut off.' Therefore these stones will be a memorial to the Israelites forever."

Nehemiah 2:20
So I answered them and said, "The God of heaven is the One who will grant us success. We, His servants, will start rebuilding, but you have no portion, right, or claim in Jerusalem."

Mark 14:9, 22-25
And truly I tell you, wherever the gospel is preached in all the world, what she has done will also be told in memory of her." . . .