פירוש על קידושין 51:7

We can’t use this verse from Jeremiah because we said earlier that money acquires land and that the deed referred to in this verse is just proof. It is not what effects the transaction.

The Talmud uses a different verse from Jeremiah to prove that documents can acquire.

Shmuel places a strong limit on the Mishnah’s rule that a document can acquire without money changing hands. This is true only if someone is giving land away. But if someone is selling land, the document does not acquire until the person also pays the money.