The Gemara in Masechta Megillah says that it is forbidden to gaze in the face of an evil person. The proof for this statement comes from Parshas Toldos. The passuk says that Yitzchok Avinu was blind, and the Gemara explains that his gazing into the face of Eisav was the cause of this disability.
Rabbi Aharon Dovid Singer
Rosh Kollel, NMB Kollel
[email protected]