Is not taking a certain path or not dealing with a certain person considered an ill omen (tiyarah)?

A mere dislike of going a certain way or dealing with a certain person is not considered tiyarah (superstitious belief in omens). Rather, it is considered tiyarah if this dislike is caused by pessimism stemming from a specific thing, such as an accident or calamity occurring after seeing a person or being in a certain place. However, if it is for a realistic reason, such as the road being narrow or crowded, or the person having bad manners, then it is not considered tiyarah.

Sheikh Ibn 'Uthaymeen clarified the difference between the forbidden pessimism, which is tatayyur based on something seen, heard, or a specific time, and the inauspiciousness (shum) mentioned in the hadith (definition): "Indeed, inauspiciousness is in three: the horse, the woman, and the house." The first is forbidden because it leads to ill thoughts of Allah and obsessive whispers (waswas), whereas the second refers to these things themselves being a cause of distress or anxiety for those who deal with them, and this is not the blameworthy pessimism.

A person who believes in tiyarah is in one of two states: either they refrain from their action in response to the tiyarah, and this is the most severe type of tatayyur, or they proceed but with anxiety and worry, and this is less severe. Both states indicate a deficiency in tawhid (definition) (monotheism) and are harmful. The original principle is that a person should proceed with a cheerful heart and reliance on Allah.