Sahih al-Bukhari Book 78, Hadith 10
"My mother who was a Mushrikah (pagan, etc.), came with her father during the period of peace pact between the Muslims and the Quraish infidels. I went to seek the advice of the Prophet (ﷺ) saying, "My mother has arrived and she is hoping (for my favor)." The Prophet (ﷺ) said, "Yes, be good to your mother."
My mother came to me, hoping (for my favor) during the lifetime of the Prophet. I asked the Prophet, "May I treat her kindly?" He replied, "Yes." Ibn 'Uyaina said, "Then Allah revealed: 'Allah forbids you not with regards to those who fought not against you because of religion, and drove you not out from your homes, that you should show them kindness and deal justly with them.'.......(60.8)
That Heraclius sent for him and said, "What did he, i.e. the Prophet (ﷺ) order you?" I replied, "He orders us to offer prayers; to give alms; to be chaste; and to keep good relations with our relatives.