مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنْ سَعِيدِ بْنِ جَنَاحٍ عَنْ بَعْضِ أَصْحَابِنَا عَنْ أَبِي عَبْدِ اللَّهِ (عليه السلام) قَالَ مَا خَلَقَ اللَّهُ عَزَّ وَ جَلَّ خَلْقاً أَصْغَرَ مِنَ الْبَعُوضِ وَ الْجِرْجِسُ أَصْغَرُ مِنَ الْبَعُوضِ وَ الَّذِي نُسَمِّيهِ نَحْنُ الْوَلَعَ أَصْغَرُ مِنَ الْجِرْجِسِ وَ مَا فِي الْفِيلِ شَيْ‏ءٌ إِلَّا وَ فِيهِ مِثْلُهُ وَ فُضِّلَ عَلَى الْفِيلِ بِالْجَنَاحَيْنِ.
348. Muhammad Bin Yahya, from Ahmad Bin Muhammad Bin Isa, from Saeed Bin Janaah, from one of our companions, who has said: Abu Abdullah  has said: ‘Allah (azwj) has not Created a creature smaller than the mosquito, and Al-Jarjas is smaller than the mosquito, and that which we call Al-Wala’a is smaller than Al-Jarjas, and there is nothing which the elephant has except that it is in it, similar to it, and it is better than the elephant by having two wings’.