1 Kings 14:2

His wife — Because she might without suspicion enquire concerning her own child; and because she would enquire exactly, and diligently, and faithfully acquaint him with the truth. Disguise — Change thy habit, and voice, and go like a private and obscure person. This caution proceeded: first, from the pride of his heart, which made him loth to confess his folly in worshipping such helpless idols, and to give glory to the God whom he had forsaken. Secondly, from jealousy and suspicion, lest the prophet knowing this, should either give her no answer, or make it worse than indeed it was. Thirdly, from policy, lest his people should by his example be drawn to forsake the calves, and to return to the God of Judah.