Someone who saw the Prophet ﷺ informed me that he was supplicating at the Stones of Zayt with his palms outstretched.
حدثنا مسلم بن إبراهيم حدثنا شعبة عن عبد ربه بن سعيد
أخبرني من رأى النبي ﷺ يدعو عند أحجار الزيت باسطا كفيه
[Its chain is sahih] Ahmad narrated it, 5/427, from the hadith of Shubah with the same wording, and see hadith 1168.