That the Messenger of Allah (saws) said: "Any skin tanned, then it has been made pure."

This Hadith is Hasan Sahih. This is acted upon according to most of the people of knowledge, they say that when the skin of a dead animal has been tanned then it has been made pure.

[Abu 'Eisa said:] Ash-Shafi'i said: "Any dead animals skin that is tanned, then it has been made pure, except for the dog and the pig." Some of the people of knowledge among the Companions of the Prophet (saws) disliked skins of predators even when tanned, and this is the view of 'Abdullah bin Al-Mubarak, Ahmad and Ishaq, and they were firm about not wearing them and performing Salat in them. Ishaq bin Ibrahim said: "The saying of the Prophet (saws):'Any skin that is tanned, then it has been made pure' only refers to the skins of animals whose meat is eaten." This is how it was explained by An-Nasr bin Shumail.

Abu Hurayra said, "I heard the Prophet, may Allah bless him and grant him peace, say, 'While a shepherd was tending to his sheep, a wolf came and snatched one of the sheep. The shepherd went after the wolf which turned to him and said, 'Who will look after them on the 'Day of Wild Beasts'? They will have no shepherd but me.' People said, 'Glory be to Allah!' The Messenger of Allah, may Allah bless him and grant him peace, said, 'I believe it - I, Abu Bakr and 'Umar.'"

From Ibn Abbas [may Allah be pleased with him] who said: “Whoever has wealth, required him to perform Hajj to the House of his Lord, or upon which Zakat is obligatory, but he does not do it, then he shall ask to return (the world) upon his death.” A man said: “Oh Ibn Abbas! Have Taqwa of Allah! It is only the disbelievers who will be asked to return.” He said: “For that, I shall recite to you from the Qur’an: You who believe! Let not your properties or your children divert you from the remembrance of Allah. And whosever does that, then they are with the losers. And spend of that which We have provided you before death comes to one of you, and says: “My Lord! If only You would give me respite for a little while, then I should give Sadaqah” up to His saying: “And Allah is All-Aware of what you do.” He said: “So what makes Zakat obligatory?” He said: “When wealth reaches two hundred or above.” He said: “What makes Hajj obligatory?” He said: “Provisions and a camel.”
(Another chain) from Ad-Dahhak : from Ibn Abbas, from the Prophet with similar.

"It is not lawful for a man to give a gift and then take it back, except in the case of the father with what he gave to his son. And the parable of the one who gives a gift, and then takes it back, is that of a dog who eats until he is full, and vomits, then he returns to his vomit."

[Abu 'Eisa said:] This Hadith is Hasan Sahih. Ash-Shafi'i said: "It is not lawful for one who confers something to take it back, except in the case of the father. He may take back what he gave his son" and he used this Hadith as proof.

"The Messenger of Allah (SAW) said: 'There is no 'Adwa (contagion), no Tiyarah (evil omen) and no Hamah.' A Bedouin man stood up and said: 'O Messenger of Allah, what do you think about a camel that suffers from mange and then all other camels get mange?' He said: 'That is because of the Divine Decree. How else did the first one get mange?'"

Note: The majority of scholars interpret this to mean that these things in and of themselves do not transmit or cause harm through supernatural or hidden means but that Allah is ultimately in control and any fearful superstition around these is false.

'I saw Abu Hurairah hitting his forehead with his hand and saying: "O people of Iraq! Do you claim that I would tell a lie against the Messenger of Allah so that it may be more convenient for you and a sin upon me?' I bear witness that I heard the Messenger of Allah say: 'If a dog licks the vessel of anyone of you, let him wash it seven times.'"

‘The one in Ihram may kill the snake, the scorpion, the aggressive predator, the vicious dog and the harmful mouse.” It was said to him: “Why is it said that they are harmful?” He said:* “Because the Messenger of Allah (saw) woke up because of one, and it had taken the wick (of the lamp) to burn down the house.”

“The Messenger of Allah (saw) forbade us to drink while (lying) on our bellies, lapping up water, and he forbade us to drink from one hand only. He said: ‘None of you should lap up water as a dog does, and he should not drink water from one hand as the people with whom Allah is angry do, and he should not drink from a vessel at night without stirring it first, unless the vessel was covered. Whoever drinks from his hand when he is able to drink from a vessel, with the intention of humility, Allah will record good deeds equivalent to the number of fingers for him. It (i.e., the hand) is the vessel of ‘Eisa bin Maryam, (as) when he threw away the cup and said: ‘Ugh! That belongs to this world.’”