Jeremiah 7:31-32 (NKJV)

31 And they have built the high
places of Tophet, which is in the
Valley of the Son of Hinnom, to
burn their sons and their
daughters in the fire, which I did
not command, nor did it come
into My heart.

32 "Therefore
behold, the days are coming,"
says the Lord, "when it will no
more be called Tophet, or the
Valley of the Son of Hinnom, but
the Valley of Slaughter; for they
will bury in Tophet until there is
no room.