Jami` at-Tirmidhi, Volume 4, Book 25, Hadith 1918 (DarusSalam) ⓘ
Sahl bin Sa'd narrated that: the Messenger of Allah said: " I and the sponsor of an orphan shall be in Paradise like these two."And he indicaed with his fingers, meaning his index and his middle finger
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ عِمْرَانَ أَبُو الْقَاسِمِ الْمَكِّيُّ الْقُرَشِيُّ، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ أَبِي حَازِمٍ، عَنْ أَبِيهِ، عَنْ سَهْلِ بْنِ سَعْدٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَنَا وَكَافِلُ الْيَتِيمِ فِي الْجَنَّةِ كَهَاتَيْنِ " . وَأَشَارَ بِأُصْبُعَيْهِ يَعْنِي السَّبَّابَةَ وَالْوُسْطَى . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
also referenced under: Hadith 1918 (Reference) & Book 27, Hadith 24 (In-Book)