Narrated Abu Huraira: Allah's Apostle said: The cattle (sheep, cows, camels, etc.) suffering from a disease should not be mixed up with healthy cattle, (or said: "Do not put a patient with a healthy person ). " (as a precaution).

Narrated `Amr: Here (i.e. in Mecca) there was a man called Nawwas and he had camels suffering from the disease of excessive and unquenchable thirst. Ibn `Umar went to the partner of Nawwas and bought those camels. The man returned to Nawwas and told him that he had sold those camels. Nawwas asked him, "To whom have you sold them?" He replied, "To such and such Sheikh." Nawwas said, "Woe to you; By Allah, that Sheikh was Ibn `Umar." Nawwas then went to Ibn `Umar and said to him, "My partner sold you camels suffering from the disease of excessive thirst and he had not known you." Ibn `Umar told him to take them back. When Nawwas went to take them, Ibn `Umar said to him, "Leave them there as I am happy with the decision of Allah's Apostle that there is no oppression . "

Narrated Abu Huraira: Allah's Apostle said, 'There is no 'Adha (no disease is conveyed from the sick to the healthy without Allah's permission), nor Safar, nor Hama." A bedouin stood up and said, "Then what about my camels? They are like deer on the sand, but when a mangy camel comes and mixes with them, they all get infected with mangy." The Prophet said, "Then who conveyed the (mange) disease to the first one?"

Narrated `Abdullah bin `Umar: Allah's Apostle said, "There is neither 'Adha (no contagious disease is conveyed to others without Allah's permission) nor Tiyara, but an evil omen may be in three a woman, a house or an animal."

Narrated Abu Huraira: I heard Allah's Apostle saying, "There is no Tiyara, and the best omen is the Fal." They asked, "What is the Fal?" He said, "A good word that one of you hears (and takes as a good omen).

Narrated Abu Huraira: The Prophet said, "There is no Tiyara and the best omen is the Fal," Somebody said, "What is the Fal, O Allah's Apostle?" He said, "A good word that one of you hears (and takes as a good omen).

Narrated Anas: The Prophet said, "No 'Adha (no contagious disease is conveyed to others without Allah's permission), nor Tiyara, but I like the good Fal, i.e., the good word."

Narrated Abu Huraira: The Prophet said, "There is no 'Adha, nor Tiyara, nor Hama, nor Safar."

Narrated `Abdullah bin `Umar: Allah's Apostle said, "there is neither 'Adha nor Tiyara, and an evil omen is only in three: a horse, a woman and a house." (See the foot-note of Hadith No. 649)

Abu Huraira also said: The Prophet said, "The cattle suffering from a disease should not be mixed up with healthy cattle (or said "Do not put a patient with a healthy person as a precaution.")

Narrated Anas bin Malik: The Prophet said, "No 'Adha nor Tiyara; but I like Fal." They said, "What is the Fal?" He said, "A good word."