Regarding Supplication (Ad-Du'a)
حَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، حَدَّثَنَا الأَعْمَشُ، عَنْ أَبِي صَالِحٍ، عَنْ سَعْدِ بْنِ أَبِي وَقَّاصٍ، قَالَ مَرَّ عَلَىَّ النَّبِيُّ صلى الله عليه وسلم وَأَنَا أَدْعُو بِأُصْبُعَىَّ فَقَالَ " أَحِّدْ أَحِّدْ " . وَأَشَارَ بِالسَّبَّابَةِ .
Narrated Sa'd ibn AbuWaqqas: The Prophet (ﷺ) passed by me while I was supplicating by pointing with two fingers of mine. He said: Point with one finger; point with one finger. He then himself pointed with the forefinger.