Genesis 44:5

Is not this it in which my lord drinketh, and whereby indeed he divineth? ye have done evil in so doing.

Cross-reference

Genesis 44:15 confirms Joseph’s divination claim, directly linking to the cup mentioned here.

Leviticus 19:26 forbids divination — contrasting directly with Joseph's claimed practice of divination with the cup.

2 Kings 21:6 mentions Manasseh practicing divination — a similar practice, though Manasseh's is condemned and Joseph's is a ruse.