His Faith In Allâh Almighty Prevented Yusuf From Evil
Question :
In Surah Yusuf, Allah Almighty says:
"..had he not seen the evidence (Burhan) of his Lord."
Here, what does Burhan (evidence) mean?
Answer:
Allah Almighty says:
"And indeed she did desire him and he would have inclined to her desire, had he not seen the evidence of his Lord.
The Burhan of his Lord, which acted as a barrier between him and doing what he would have been inclined to do, was his faith in Allah Almighty and his fear of Him Almighty, for one's faith in Allah Almighty protects one from sinning, from perpetrating unlawful acts. And the more one is knowledgeable of Allah Almighty, the more will one fear Him; Allâh Almighty says:
"It is only those who has knowledge among His servants that fear Allah."
Yusuf saw his Lord's evidence, which was a light that Allah Almighty infused into his heart, and the source of this light was faith and piety.
Source:
Ibn 'Uthaimin
Fatawa Islamiyah, Vol. 7 Pages 132-133