Sahl ibn Sa'd reported that the Prophet ﷺ said, "I and the guardian of the orphan will be in the Garden like that," indicating his forefinger and middle finger.
الأدب المفرد ١٣٥:
عَنِ النَّبِيِّ ﷺ قَالَ أَنَا وَكَافِلُ الْيَتِيمِ فِي الْجَنَّةِ هَكَذَا وَقَالَ بِإِصْبَعَيْهِ السَّبَّابَةِ وَالْوُسْطَى