This excerpt is taken from Sheikh Hussain bin Mubarak Al-Mosuli's Arabic book Al-Awamer wal Nawaahi, whose Urdu translation has been done by Muhammad Sarwar Gohar Sahib under the title Ahkamaat o Mamnooat.
① Amr bin Shu'aib narrates from his father, and he from his grandfather, that the Messenger of Allah, peace be upon him, said:
من تطبب ولم يعلم منه طب فهو ضامن
"Whoever does not have knowledge of medicine but still treats (someone), then (in case of harm) he is liable."
Reference: Abu Dawood, Kitab al-Diyat 4586. An-Nasa'i, Al-Qisamah 406/8.
① It is narrated from Sayyiduna Anas رضي الله عنه that the Messenger of Allah صلی اللہ علیہ وسلم said:
لا عدوىٰ ولا طيرة ويعجبني الفأل
"No disease is contagious, nor is there any reality in bad omen, but I like good omens."
He was asked: What is a good omen? He said:
كلمة طيبة
"A good thing."
Reference: Bukhari, Book of Medicine 5756. Muslim, Book of Peace 11 / 2224.
② Sayyiduna Ibn Umar رضي الله عنهما reports that the Messenger of Allah صلی اللہ علیہ وسلم said:
لا عدوىٰ ولا طيرة ، وإنما الشؤم فى ثلاث : فى الفرس ، والمرأة ، والدار
"No disease is contagious, nor is there any reality in bad omen; misfortune is only in three things: the horse, the woman, and the house."
Reference: Bukhari, Book of Medicine 5772. Muslim, Book of Peace 2225/115.
③ It is narrated from Sayyiduna Abu Huraira رضي الله عنه that the Messenger of Allah صلی اللہ علیہ وسلم said:
لا عدوىٰ ولا طيرة ولا هامة ولا صفر
"The contagiousness of disease, the owl being unlucky, and the yellow color are nothing."
Reference: Bukhari, Book of Medicine 5757. Muslim, Book of Peace 2220/101.