Genesis 44:5
ESV - 5 Is it not from this that my lord drinks, and by this that he practices divination? You have done evil in doing this.'
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.
The steward charged them with being ungrateful, rewarding evil for good; with folly, in taking away the cup of daily use, which would soon be missed, and diligent search made for it; for so it may be read, Is not this it in which my lord drinketh, as having a particular fondness for it, and for which he would search thoroughly? Or, By which, leaving it carelessly at your table, he would make trial whether you were honest men or not? They throw themselves upon Joseph's mercy, and acknowledge the righteousness of God, perhaps thinking of the injury they had formerly done to Joseph, for which they thought God was now reckoning with