Gleanings — Paragraph 252
Source (Arabic)
ولا تحملوا علی النّاس ما لا تحملوه علی انفسكم ولن ترضوا لأحد ما لا ترضونه لكم وهذا خیر النّصح لو انتم من السّامعین
Translation
Lay not on any soul a load which ye would not wish to be laid upon you, and desire not for anyone the things ye would not desire for yourselves. This is My best counsel unto you, did ye but observe it.