John Trapp on Jeremiah 31:40

Ver. 40. And the whole valley of the dead bodies] Of Rephaim ſay ſome. of Tophet ſay others: See on ver. 39.

Shall be holy unto the Lord] So is the holy Catholike Church, the new Jeruſalem which is above eſpecially.

It ſhall not be plucked up, nor thrown down any more for ever] This cannot be applyed to the earthly Jeruſalem, which was plucked up and thrown down by the Romans once and again: but eſpecially by Aelius Adrianus the Emperour, who laid the whole Country waſte almoſt, drove the Jews utterly out of it, ſet a Sow of white marble over the chief gate of Jeruſalem in reproach of their Religion, and called the City by his own name Aelia, commanding the Jews not once to look towards it from any tower or hill. It muſt be therefore meant of tht Church, which cannot be ruinated.