Al-Adab Al-Mufrad, Hadith 135 ⓘ
Sahl ibn Sa'd reported that the Prophet, may Allah bless him and grant him peace, said, "I and the guardian of the orphan will be in the Garden like that," indicating his forefinger and middle finger.
حَدَّثَنَا عَبْدُ اللهِ بْنُ عَبْدِ الْوَهَّابِ قَالَ: حَدَّثَنِي عَبْدُ الْعَزِيزِ بْنُ أَبِي حَازِمٍ قَالَ: حَدَّثَنِي أَبِي قَالَ: سَمِعْتُ سَهْلَ بْنَ سَعْدٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ: أَنَا وَكَافِلُ الْيَتِيمِ فِي الْجَنَّةِ هَكَذَا، وَقَالَ بِإِصْبَعَيْهِ السَّبَّابَةِ وَالْوُسْطَى.
also referenced under: Book 7, Hadith 7 (In-Book) & Book 7, Hadith 135 (English)