Some of Those To whom Allah has given insight can work out people’s character From their Facial expressions.
“And you would know them by their mark; but you will surely know them by the tone of [their] speech”.(Muhammad 47:30).
Ibn al-Qayyim (May Allah have mercy on him) said, commenting on this verse: What is meant is that Allah, may He be glorified, affirmed that the Prophet(saw) should know about them From the tone of their speech,because knowing about the speaker and what he is hiding in his heart is more accurate than Finding that out by looking at his Facial Features and expression —