It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) decreed that "one fifth of rikaz (buried treasure) is obligatory to be deposited in the Bayt al-Mal (public treasury)."

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) decreed that "one fifth of rikaz (buried treasure) is obligatory to be deposited in the Bayt al-Mal (public treasury)."

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: "No man should lie down with another man who is naked, and no woman should lie down with another woman who is naked."

The previous hadith is also narrated mursal through this second chain.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that when the Prophet (peace and blessings be upon him) returned from the Battle of Badr, someone said to the Prophet (peace and blessings be upon him), "Now proceed after the caravan of Quraysh; there is no obstacle now to reach it." Upon hearing this, Abbas—who had not yet embraced Islam at that time—called out and said, "This is not appropriate for you." He was asked, "Why?" He replied, "Allah had promised you one of the two groups, and He has already given it to you."

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that Sayyiduna Ma'iz bin Malik (may Allah be pleased with him) was brought to the Prophet (peace and blessings be upon him), and he confessed to adultery twice. The Prophet (peace and blessings be upon him) said: "Take him away." Then he was called back, and he confessed two more times, until he had confessed four times regarding himself. Only then did the Prophet (peace and blessings be upon him) order that he be stoned.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that during the blessed era of the Prophet (peace and blessings be upon him), the caliphate of Abu Bakr, and the first two years of the caliphate of Umar, three divorces were considered as only one. But later, Sayyiduna Umar (may Allah be pleased with him) said that people began to hasten in a matter in which they were given ease (started giving many divorces), so if we enforce three divorces as three, it would be better. Thus, he enforced this ruling.

Sadaqah Damashqi says that a man came to Sayyiduna Ibn Abbas (may Allah be pleased with them both) and asked him about voluntary fasts. He replied that the Messenger of Allah (peace and blessings be upon him) used to say: "The best way of observing voluntary fasts is the way of my brother Dawud (peace be upon him); he used to fast one day and break the fast the next day."

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) also performed Hajj Tamattu', and Sayyiduna Abu Bakr Siddiq, Sayyiduna Umar, and Sayyiduna Uthman (may Allah be pleased with them) also performed it. The first person to prohibit it was Sayyiduna Amir Muawiyah (may Allah be pleased with him).

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that once the Prophet (peace and blessings be upon him) wanted to perform ablution from a waterskin, so someone informed him that it was made from the skin of a dead animal. The Prophet (peace and blessings be upon him) said, "Tanning removes its filth and impurity."