On the meaning of the phrase “passing through the fire,” see 2 Kings 16:3, and Leviticus 20:2-5.
To “observe times” was forbidden in the Law (marginal references), and was no doubt among the modes of divination practiced by the Canaanite nations. It has been explained as,
(1) Predicting from the state of the clouds and atmosphere;
(2) Fascination with the eye;
(3) Watching and catching at chance words as ominous.
Dealt with familiar spirits - This practice was forbidden by Moses Leviticus 19:31 under the penalty of death Leviticus 20:27. Its nature is best learned from Saul’s visit to the witch of Endor (1 Samuel 28:7, etc.).
Wizards - “Wizards” - literally, “wise men” - are always joined with those who have familiar spirits. Probably they were a sort of necromancers.