Givers of prosperity, idols in human shape, large or small, analogous to the images of ancestors which were revered by the Romans. In order to deceive the guards sent by Saul to seize David, Michal his wife prepared one of the household teraphim, putting on it the goat’s-hair cap worn by sleepers and invalids, and laid it in a bed, covering it with a mantle. She pointed it out to the soldiers, and alleged that David was confined to his bed by a sudden illness (1 Sam. 19:13-16). Thus she gained time for David’s escape. It seems strange to read of teraphim, images of ancestors, preserved for superstitious purposes, being in the house of David. Probably they had been stealthily brought by Michal from her father’s house. “Perhaps,” says Bishop Wordsworth, “Saul, forsaken by God and possessed by the evil spirit, had resorted to teraphim (as he afterwards resorted to witchcraft); and God overruled evil for good, and made his very teraphim (by the hand of his own daughter) to be an instrument for David’s escape.”, Deane’s David, p. 32. Josiah attempted to suppress this form of idolatry (2 Kings 23:24). The ephod and teraphim are mentioned together in Hos. 3:4. It has been supposed by some (Cheyne’s Hosea) that the “ephod” here mentioned, and also in Judg. 8:24-27, was not the part of the sacerdotal dress so called (Ex. 28:6-14), but an image of Jehovah overlaid with gold or silver (comp. Judg. 17, 18; 1 Sam. 21:9; 23:6, 9; 30:7, 8), and is thus associated with the teraphim. (See THUMMIM.)
Teraphim
What are teraphim? The verses never explain them. Micah, in the book of Judges, has a house of gods and makes an ephod and teraphim, then consecrates one of his sons as his priest. The word points to household figures, kept alongside worship. In Genesis 35, when Jacob calls his household to go up to Bethel, he tells them to put away the strange gods among them, and they hand over everything they carry. Both passages treat these objects as a rival to the worship of the Lord. Judges 17 and Genesis 35 are the two to read.
4 verses
Genesis
Then Jacob said unto his household, and to all that were with him, Put away the strange gods that are among you, and be clean, and change your garments:
And let us arise, and go up to Bethel; and I will make there an altar unto God, who answered me in the day of my distress, and was with me in the way which I went.
And they gave unto Jacob all the strange gods which were in their hand, and all their earrings which were in their ears; and Jacob hid them under the oak which was by Shechem.
Judges
And the man Micah had an house of gods, and made an ephod, and teraphim, and consecrated one of his sons, who became his priest.
From Easton's Bible Dictionary
Matthew George Easton, 1897