Muwatta Imam Malik Book of Hair, Hadith 5
Yahya related to me from Malik that Safwan ibn Sulaym heard that the Prophet ﷺ said, "I and the one who guards the orphan, whether for himself or for someone else, will be like these two in the Garden, when he has taqwa," indicating his middle and index fingers.
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ صَفْوَانَ بْنِ سُلَيْمٍ، أَنَّهُ بَلَغَهُ أَنَّ النَّبِيَّ ﷺ قَالَ " أَنَا وَكَافِلُ الْيَتِيمِ لَهُ أَوْ لِغَيْرِهِ فِي الْجَنَّةِ كَهَاتَيْنِ إِذَا اتَّقَى " . وَأَشَارَ بِإِصْبُعَيْهِ الْوُسْطَى وَالَّتِي تَلِي الإِبْهَامَ .