Jeremiah 7:31 (ESV)
“And they have built the high places of Topheth, 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 mind.”
We see here that the source of the idea of child sacrifice was not the mind of God. From where did it come? It is in the mind of man to sacrifice children, and it seems that it originates in that evil heart. To sacrifice the lives of children is from the mind of man and evil all the way to its source.