Sahl (b. Sa’d) reported the prophet (May peace be upon him) as saying; I and the one who takes the responsibility of an orphan will be in Paradise thus, and he joined his middle finger and forefinger.  

أَنَّ النَّبِيَّ ﷺ قَالَ أَنَا وَكَافِلُ الْيَتِيمِ كَهَاتَيْنِ فِي الْجَنَّةِ وَقَرَنَ بَيْنَ أُصْبُعَيْهِ الْوُسْطَى وَالَّتِي تَلِي الإِبْهَامَ