Exodus 13:8-9

13:8 You are to tell your son on that day, ‘It is because of what the Lord did for me when I came out of Egypt.’ 13:9 It will be a sign for you on your hand and a memorial on your forehead, so that the law of the Lord may be in your mouth, for with a mighty hand the Lord brought you out of Egypt.

Joshua 4:7

4:7 tell them how the water of the Jordan stopped flowing before the ark of the covenant of the Lord. When it crossed the Jordan, the water of the Jordan stopped flowing. These stones will be a lasting memorial for the Israelites.”

Zechariah 6:14

6:14 The crown will then be turned over to Helem, Tobijah, Jedaiah, and Hen son of Zephaniah as a memorial in the temple of the Lord.