Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates that the Prophet (peace and blessings be upon him) entered into Ihram with the intention of Hajj. Upon reaching Makkah, he performed Tawaf of the Ka'bah and Sa'i between Safa and Marwah, but due to having brought the sacrificial animal, he did not shave or cut his hair to become halal. And he instructed those who had not brought the sacrificial animal with them to "perform Tawaf and Sa'i, and after shortening or shaving their hair, they should become halal."

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that once the Prophet (peace and blessings be upon him) ate meat from the shoulder or meat with bone, then performed the prayer with his previous ablution without making a fresh ablution.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Observe the fast of Ashura, but oppose the Jews in this matter, and do so by also fasting one day before it or one day after it."

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that whenever the Prophet (peace and blessings be upon him) had cupping done, he would have it done on the veins on both sides of the neck. On one occasion, the Prophet (peace and blessings be upon him) called a slave from Banu Bayadah, and he performed the cupping. The Prophet (peace and blessings be upon him) gave him one and a half mudd of wheat as payment, and spoke to his masters regarding this matter, so they reduced it by half a mudd, otherwise previously it was a full two mudd.

It is narrated from Sayyiduna Ibn Umar and Sayyiduna Ibn Abbas (may Allah be pleased with them) that the Prophet (peace and blessings of Allah be upon him) prescribed the method of offering two rak‘ahs during travel, therefore these two rak‘ahs are complete, not incomplete, and offering Witr during travel is also established from the Sunnah.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever participates in building a mosque for Allah—even if it is as small as a bird’s nest where a sandgrouse lays its eggs—Allah will build for him a house in Paradise."

Abu Jamrah al-Duba'i says: I put on the ihram with the intention of performing Hajj Tamattu', but people forbade me. I went to Sayyiduna Ibn Abbas (may Allah be pleased with them both) and asked him about this issue, so he told me to go ahead and do it. Then I set out towards the House of Allah, and when I arrived there, I fell asleep. In my dream, a person came to me and said: "Your 'Umrah has been accepted and your Hajj is also accepted." When I woke up from the dream, I went to Sayyiduna Ibn Abbas (may Allah be pleased with them both) and told him about my dream. Upon this, he said "Allahu Akbar" twice and said: "This is the Sunnah of Abu al-Qasim (peace and blessings be upon him)." And he said: "In Hady, participation is allowed in a camel, cow, goat, or an animal shared by seven people."

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that once some people began to ask him about the prayer during travel. He replied that the Prophet (peace and blessings of Allah be upon him), after leaving his home, would continue to perform two rak‘ahs (shortened prayer) until he returned home.

The previous hadith is also narrated through this second chain of transmission.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) forbade the use of the milk of a goat that eats filth, and from (using) an animal that is tied up and used as a target, and he forbade drinking water directly from the mouth of a waterskin.