Cloaks from Heera (Fatwa)
On one occasion, Hazrat Umar (ra) decided to prohibit people from wearing cloaks from Heera, which was an area three miles from Kufa towards Najaf. The reason was that urine was added in order to dye the cloth or perhaps they would add animal urine in order to fade the cloth. Hazrat Ubayy (ra) said, “You are not authorised to sanction this because the Holy Prophet (sa) himself wore clothes of this colour and wore cloaks from there, thus we also wore it during the life of the Holy Prophet (sa) and there were no issues.” Upon hearing this, Hazrat Umar (ra) remained silent and said that Hazrat Ubayy (ra) was correct.
(Sheikh Shah Moinuddin Ahmad Nadvi, Siyar al-Sahabah, Vol. 3 [Karachi, Pakistan: Dar al-Ishaah Urdu Bazar, 2004] 156) (Yaqut Ibn Abd Allah al-Hamawi, Mu‘jam al-Buldan, Vol. 2 [Beirut, Lebanon: Dar Ihya al-Turath al-Arabi] 328) (Fiqh-e-Ahmadiyyah, Vol. 1, pp. 335-336)