Jeremiah 51:63

Overview - Jeremiah 51
The severe judgment of God against Babylon, in revenge of Israel.
59 Jeremiah delivers the book of this prophecy to Seraiah, to be cast into Euphrates, in token of the perpetual sinking of Babylon.
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Jeremiah 51:63  (King James Version)
And it shall be, when thou hast made an end of reading this book, that thou shalt bind a stone to it, and cast it into the midst of Euphrates:

thou shalt bind
This was the emblem of its overthrow and irretrievable ruin; and the same emblem is employed in Revelation 18:21 ,to denote the utter ruin of mystical Babylon.
Jeremiah 19:10 Jeremiah 19:11 Revelation 18:21