Sahih al-Bukhari, Volume 7, Book 63, Hadith 224 (USC-MSA) ⓘ
Narrated Sahl: Allah's Messenger said, "I and the one who looks after an orphan will be like this in Paradise," showing his middle and index fingers and separating them.
حَدَّثَنَا عَمْرُو بْنُ زُرَارَةَ، أَخْبَرَنَا عَبْدُ الْعَزِيزِ بْنُ أَبِي حَازِمٍ، عَنْ أَبِيهِ، عَنْ سَهْلٍ، قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَنَا وَكَافِلُ الْيَتِيمِ فِي الْجَنَّةِ هَكَذَا " . وَأَشَارَ بِالسَّبَّابَةِ وَالْوُسْطَى، وَفَرَّجَ بَيْنَهُمَا شَيْئًا.
also referenced under: Book 68, Hadith 53 (In-Book) & Hadith 5304 (DarusSalam)