Charles H. Spurgeon on Psalms 106:37

Devils, Mydv, Shedim. It appears that children were sacrificed to the deities thus named; that they were considered to be of an angry nature, and inimical to the human race, and thus the object of the homage rendered to them was to avert calamities. The name Mydv may signify either lord or master, or anything that is black, it being derived from an Arabic Ain Vav verb —viz., to be black, or to be master. John Jahn, in "Biblical Antiquities."

Verse 37-38. We stand astonished, doubtless, at this horrid, barbarous, and unnatural impiety, of offering children by fire to a Moloch: but how little is it considered, that children, brought up in the ways of ignorance, error, vanity, folly, and vice, are more effectually sacrificed to the great adversary of man kind! —George Horne.