'Tablet' in the Bible

Do not let kindness and truth leave you;Bind them around your neck,Write them on the tablet of your heart.

Bind them on your fingers;Write them on the tablet of your heart.

Then the Lord said to me, “Take for yourself a large tablet and write on it in ordinary letters: Swift is the booty, speedy is the prey.

Now go, write it on a tablet before themAnd inscribe it on a scroll,That it may serve in the time to comeAs a witness forever.

The sin of Judah is written down with an iron stylus;With a diamond point it is engraved upon the tablet of their heartAnd on the horns of their altars,