Oppression upon Imam Reza (as)

Hārūn al-Rashid sent al-Julūdi to war against Mohammed b. Ja‘far b. Mohammed, who revolted against him.  He ordered him to attack the ‘Alawides’ house and to plunder their womenfolk of their garments and jewels and not to leave them wearing anything except a garment for each of them.
Al-Julūdi attacked the house of Imām al-Ridā, peace be on him, so the Imām stood up and gathered the ‘Alawide ladies from among the daughters of Allah’s Messenger, may Allah bless him and his family, in one house, and then he stood up at the door of the house. Al-Julūdi said to the Imām:
“There is no escape from that; I should enter the house and plunder them (of their garments and jewels) just as Hārūn al-Rashid ordered me.”
“I will give (their garments and jewels), retorted the Imām, “I swear (by Allah) that I will take all the things they are wearing.”
The Imām went on convincing al-Julūdi, and he became calm. Then the Imām entered the house and gathered the garments and ornaments of the ‘Alawide ladies, to the extent that he gathered their earrings, their anklets, and their buttons. Then he handed over all these things to al-Julūdi, who handed them over to the tyrannical one of Baghdad (i.e. Hārūn al-Rashid). ( Uyūn Akhbār al-Ridā, vol. 2, p. 161. Bihār al-Anwār, vol.49, p. 166. )

Reference :The life of Imām'Ali Bin Mūsā al-Ridā