What the one in ihram must avoid

It is narrated from Aslam (may Allah have mercy on him), the freed slave of Sayyiduna Umar bin al-Khattab (may Allah be pleased with him), that Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) saw Sayyiduna Talhah (may Allah be pleased with him) wearing two dyed garments while in the state of ihram, and asked: "What is this?" He replied: "O Commander of the Believers! There is no harm in it; it is only red clay (mishq) dye." At that Sayyiduna Umar (may Allah be pleased with him) said: "O group of Companions! You are leaders whom the people follow. It may be that an ignorant person sees you and says: 'I saw Talhah wearing two dyed garments,' and so concludes that he wore coloured clothing in ihram. So let me never see any of you wearing a dyed garment in the state of ihram."
This chain is sahih (authentic) and mawquf (stopping at the Companion), and this report is a foundational basis for the principle of sadd al-dhara'i' (blocking the possible means to harm).

Imam Ahmad bin Mani' narrated with his chain from Abu Ja'far that Sayyiduna Umar al-Faruq (may Allah be pleased with him) saw Sayyiduna Abdullah bin Ja'far (may Allah be pleased with them both) wearing two dyed garments while in the state of ihram, and asked (by way of inquiry): "What is this?" At that Sayyiduna Ali al-Murtada (may Allah be pleased with him) replied (in his defence): "I do not think that anyone will teach us the Sunnah (that is, we know the Sunnah of the Prophet (peace and blessings be upon him) and act upon it)."

Imam Musaddad (may Allah have mercy on him) relates: Yahya narrated to us from Sufyan, from Mansur, from Salim bin Abi al-Ja'd, that a woman asked Sayyiduna Abdullah bin Umar (may Allah be pleased with them both): "May I wash my clothes while I am in the state of ihram?" He replied: "Indeed, Allah Almighty has nothing to do with your dirt (that is, Allah does not wish to see you dirty, so there is no harm in washing clothes for the sake of cleanliness)."

It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that he said: "A person in the state of ihram may take a bath, and he may also wash his (ihram) clothes if he wishes."
This report is sahih (authentic) in its chain, and it is the Companion's own statement (mawquf).
A report with the same meaning is also narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both), in which he stated the same ruling.

Abu Awanah narrated the like of it through Yazid bin Abi Ziyad, from Mujahid, from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both).

It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that he said: "A woman who has entered ihram should not wear garments scented with perfume, but she may wear garments dyed with safflower ('usfur), and I do not consider the yellow (of safflower) to be perfume."
This report is sahih (authentic) in its chain, and it is mawquf (the Companion's statement).

Imam Musaddad (may Allah have mercy on him) relates: Yahya informed us through Isma'il bin Abi Khalid, who narrates from his sister, that she saw the Mother of the Believers, Sayyidah Aishah al-Siddiqah (may Allah be pleased with her), on the evening of the Day of Tarwiyah (the 8th of Dhu al-Hijjah), wearing a shift dyed rose-pink or with safflower and a black head-covering, while she was in the state of ihram.
The imams and commentators of hadith infer from this report that it is permissible for women to wear coloured clothes in the state of ihram, provided they are not perfumed and the purpose is not display or attracting the attention of men.

It is narrated from the mother and the sister of Isma'il bin Abi Khalid that they both came to the Mother of the Believers, Sayyidah Aishah (may Allah be pleased with her), and at that time she was wearing a rose-coloured garment and a black head-covering. She was asked: "May a woman in the state of ihram cover her face?" At that Sayyidah Aishah (may Allah be pleased with her) raised her head-covering from the side of her chest and placed it over her head like this (so that the face was covered), and said: "There is no harm in this."

It is narrated from Sayyidah Aishah (may Allah be pleased with her) that she used to grant a woman in the state of ihram the concession and permission to wear gloves.

Sayyiduna Ya'la bin Umayyah (may Allah be pleased with him) narrates from his father that a man came to the Prophet (peace and blessings be upon him). He was wearing a cloak on which traces of a yellow perfume (khaluq) were visible, and he asked: "What should I do in my Umrah (regarding ihram)?" Just then divine revelation began to descend upon him (peace and blessings be upon him), and he (peace and blessings be upon him) was covered with a cloth. And Umayyah (the narrator's father) had a strong desire to see the Messenger of Allah (peace and blessings be upon him) in the state of receiving revelation (then the narrator related the complete hadith).
I (Ibn Hajar) say: In the chain of this report the narrator named Abbas made an error. In reality this report is narrated by Ibn Ya'la bin Umayyah from his father (Sayyiduna Ya'la), so this hadith actually belongs to Sayyiduna Ya'la bin Umayyah (may Allah be pleased with him), not to his father Umayyah.

It is narrated from Sayyiduna Ali (may Allah be pleased with him) that he said: "Any man who marries while he is in the state of ihram, we will separate his wife from him, and that marriage of his will not be (legally) valid or recognised."

Imam al-Harith (may Allah have mercy on him) relates that Abu Abdullah said: I was with Sa'id bin Jubayr (may Allah have mercy on him), and he saw a man pushing his head between the covering of the Ka'bah and the wall of the House of Allah. He forbade him from doing that and said: I heard Sayyiduna Ibn Abbas (may Allah be pleased with them both) say: "The Messenger of Allah (peace and blessings be upon him) forbade that a person in the state of ihram should put his head between the covering and the wall, or he said, between the covering and the House of Allah."