Musnad Ishaq

Benefits:
➊ ‘Adwa: ... refers to the transmission of disease. In the blessed era of the Noble Prophet sallallahu alayhi wa sallam, people held the belief that one person’s illness could be transmitted to another. The Messenger of Allah sallallahu alayhi wa sallam refuted this belief of the people. A Companion presented to the Messenger sallallahu alayhi wa sallam: “We tie a camel with mange among healthy camels, and the healthy camel also contracts mange.” In response, the Messenger of Allah sallallahu alayhi wa sallam said: “Who made the first camel afflicted with mange?” (Sahih Muslim, no. 2220)
It is thus understood that just as the first person is afflicted with illness by the will of Allah, the Possessor of Majesty, likewise, the rest of the people or animals are also afflicted with illness only by the will of Allah, the Possessor of Majesty. No disease is inherently contagious in itself.

➋ Tiara: ... superstition. In the era of ignorance (Jahiliyyah), people, at the beginning of a long journey or an important task, would set a bird to flight; if the bird flew to the right, they considered it auspicious and successful, and would proceed with their journey or task. If it flew to the left, they would abandon their plan, considering it inauspicious. Islamic law has condemned this practice and called it shirk (associating partners with Allah). As narrated from Sayyiduna Abdullah ibn Mas‘ud radi Allahu anhu, the Messenger of Allah sallallahu alayhi wa sallam said three times: ((At-tiyaratu shirkun, at-tiyaratu shirkun... etc.)) (Sunan Abi Dawud, no. 3910) “Superstition is shirk, superstition is shirk.”
In the present era, countless customs of this kind are prevalent, such as considering it inauspicious if a cat crosses one’s path, or not beginning any good deed in the month of Safar, etc.

➌ Haamah: ... In the era of ignorance, people held the belief that if the blood of a murdered person was not avenged, his soul would take the form of an owl, wandering and shrieking, demanding retribution. Due to this ignorant belief, feuds would arise among people, and these feuds would continue for generations. Islamic law has declared this belief to be false.

➍ Safar: ... Among the polytheistic beliefs of the era of ignorance was also Safar. Regarding Safar, they believed that it was a worm in the stomach that gnawed at the stomach during hunger, and sometimes a person would die because of it. The Arabs considered this disease to be contagious. Imam Muslim rahimahullah has narrated these meanings of Safar from Sayyiduna Jabir radi Allahu anhu. (Muslim, Kitab al-Salam, no. 5797)
Some have interpreted this as referring to the month of Safar, because the polytheists, in order to make the month of Muharram lawful, would declare the month of Safar as the sacred month in its place. Others have said that in the era of ignorance, the month of Safar was considered inauspicious. Even now, this ignorant custom persists among Muslims, as people consider it inauspicious to marry in this month.