رَوَى حَمَّادُ بْنُ عُثْمَانَ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ: قُلْتُ لَهُ جُعِلْتُ فِدَاكَ نَرَى اَلدَّوَابَّ فِي بُطُونِ أَيْدِيهَا مِثْلُ اَلرُّقْعَتَيْنِ فِي بَاطِنِ يَدَيْهَا مِثْلُ اَلْكَيِّ فَأَيُّ شَيْءٍ هُوَ قَالَ «ذَلِكَ مَوْضِعُ مَنْخِرَيْهِ فِي بَطْنِ أُمِّهِ.
Hammad ibn Uthman narrated from Abu Abdullah (a.s), who said: I said to him, "May I be your ransom! We see markings on the undersides of the forelegs of animals, like two patches or brands. What is that?" Imam (a.s) replied: "That is the place where their nostrils were positioned while they were in their mother's womb."