The Messenger of Allah ﷺ passed by me while I was supplicating with my fingers, and he said, "One, one," pointing with his index finger.
أخبرنا محمد بن عبد الله بن المبارك المخرمي قال حدثنا أبو معاوية قال حدثنا الأعمش عن أبي صالح
مر علي رسول الله ﷺ وأنا أدعو بأصابعي فقال أحد أحد وأشار بالسبابة
[Its chain is daif] Abu Dawud narrated it, Prayer, chapter on supplication, no. 1499, from the hadith of Abu Muawiya Dareer through this route. It also appears in Kubra, no. 1196, and Hakim graded it sahih at 1/536, as did Dhahabi. See the previous hadith.