Jeremiah 19:4

4 I am going to do this because the people have abandoned me and defiled this place by offering sacrifices here to other gods - gods that neither they nor their ancestors nor the kings of Judah have known anything about. They have filled this place with the blood of innocent people,

Jeremiah 19:4 Meaning and Commentary

Jeremiah 19:4

Because they have forsaken me
My worship, as the Targum; they had apostatized from God, relinquished his service, neglected and despised his word and ordinances, and left the religion they had been brought up in, and was agreeable to the will of God. This, with what follows, contain reasons of the Lord's threatening them to bring evil upon them, as before: and have estranged this place;
or made a strange place of it, so that it could scarcely be known to be the same, nor would the Lord own it as his; meaning either the city of Jerusalem, to which the prophet was near, and could point to it; or the temple, which was in sight, and which they had strangely abused, by offering strange sacrifices to strange gods; or the valley of Hinnom, the spot he was upon, and which they had alienated from its original use: and have burnt incense in it unto other gods;
to strange gods, the gods of the Gentiles; and this they did both in the city of Jerusalem and in the temple, and very probably in the valley of Hinnom, where they sacrificed their children: gods whom neither they nor their fathers have known, nor the kings of Judah;
of whose wisdom, power, and goodness, neither they nor their fathers before them, nor any of their kings, had had any instance; and whose help and assistance, in times of danger and difficulty, they had had no experience of; and, till now, neither they nor their ancestors had ever owned them, or acknowledged them; nor scarce had heard of their names; nor any of their pious kings, as David, Asa, Jehoshaphat, Hezekiah, and Josiah: and have filled this place with the blood of innocents;
young children that were sacrificed here to idols, as they were in the valley of Hinnom, which seems to be the place principally intended; so that they were not only guilty of idolatry, but of murder; and of the murder of innocent creatures, and even, of their own babes; which was shocking and unheard of cruelty!

Jeremiah 19:4 In-Context

2 and to go through Potsherd Gate out to Hinnom Valley. There I was to proclaim the message that he would give me.
3 The Lord told me to say, "Kings of Judah and people of Jerusalem, listen to what I, the Lord Almighty, the God of Israel, have to say. I am going to bring such a disaster on this place that everyone who hears about it will be stunned.
4 I am going to do this because the people have abandoned me and defiled this place by offering sacrifices here to other gods - gods that neither they nor their ancestors nor the kings of Judah have known anything about. They have filled this place with the blood of innocent people,
5 and they have built altars for Baal in order to burn their children in the fire as sacrifices. I never commanded them to do this; it never even entered my mind.
6 So then, the time will come when this place will no longer be called Topheth or Hinnom Valley. Instead, it will be known as Slaughter Valley.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.