Final answer:
There is no provided information on the first thing Yusuf told the men in prison; thus, it's not possible to answer this question accurately or to understand the significance of his words without further context.
Step-by-step explanation:
The first thing that Yusuf told the men in prison is not directly referenced in the provided information. Therefore, it is not possible to determine exactly what Yusuf said or why without access to the specific text detailing this event.
In literature, characters often reveal important information or insights into their character early in their interactions, which can drive the narrative forward or elucidate one's ethics and values.
Unfortunately, without the specific context or reference to Yusuf's words to the men in the prison, we cannot provide a detailed analysis or explanation of his first statement and its significance.