It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) prescribed a penalty of one dinar for intercourse with a menstruating woman, and if a man fulfills his desire with her after the blood has stopped but before she has performed ghusl, then in that case half a dinar is obligatory for intimacy, and all this detail is transmitted from the Prophet (peace and blessings be upon him).

Ibn Abbas (may Allah be pleased with them both) was amazed at those people who begin the month in advance, even if the moon has not been sighted, and he used to say that the Prophet (peace and blessings be upon him) said: "If the moon is not sighted, then complete the count to thirty."

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that, to my knowledge, the Prophet (peace and blessings be upon him) did not fast on any day seeking its virtue over other days, except for the Day of Ashura and this blessed month of Ramadan.

Ata bin Abi Rabah says that once Abdullah bin Abbas (may Allah be pleased with them both) invited his brother, Sayyiduna Fadl (may Allah be pleased with him), to eat on the day of Arafah. He replied that he was fasting. Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: Do not fast on this day (in the state of Ihram), because milk was milked and presented to the Prophet (peace and blessings be upon him) in a vessel on this day, and the Prophet (peace and blessings be upon him) drank it. And people follow you (so seeing you fasting, they might start considering it important).

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 after the obligatory prayers, raising the voice in the remembrance of Allah used to take place during the blessed era of the Prophet (peace and blessings be upon him), and I would only come to know that the people had finished the prayer when I heard this sound.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that once I spent the night at the house of my maternal aunt, Sayyida Maymunah (may Allah be pleased with her). The Prophet (peace and blessings be upon him) woke up during a part of the night, performed ablution from a water-skin, and stood up for prayer. I also stood up when I saw the Prophet (peace and blessings be upon him) doing so, performed ablution from the water-skin, and stood on his left side. The Prophet (peace and blessings be upon him) took hold of me by the waist and made me stand on his right side.

Ikrimah and Kuraib say that once Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: Shall I not relate to you about the prayer of the Prophet (peace and blessings be upon him) during travel? We said: Certainly. He said: If, at the place where the Prophet (peace and blessings be upon him) halted, the sun had started to decline from its zenith, he (peace and blessings be upon him) would combine Zuhr and Asr prayers before mounting (to depart). And if, at the time of halting, this had not happened, he (peace and blessings be upon him) would continue his journey, and when the time for Asr arrived, he would halt and combine Zuhr and Asr prayers. Similarly, if the time for Maghrib occurred while halting, he (peace and blessings be upon him) would combine Maghrib and Isha prayers at that time. Otherwise, he would continue the journey, and when the time for Isha arrived, he would halt and combine Maghrib and Isha prayers.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) forbade selling grain before taking possession of it. In my opinion, this applies to everything.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) forbade meeting traders on the way before they reach the city and buying goods from them at a price of one's own choosing, or for a city dweller to buy and sell on behalf of a villager. When the narrator asked Sayyiduna Ibn Abbas (may Allah be pleased with them both) about the meaning of this, he replied that no city dweller should act as a broker for a villager.