Al-Kāfi - Volume 6 > Choosing the Camel
Hadith #6

عَنْهُ عَنْ أَبِيهِ عَمَّنْ ذَكَرَهُ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ نَهَى رَسُولُ اللَّهِ ( صلى الله عليه وآله ) أَنْ يُتَخَطَّى الْقِطَارُ قِيلَ يَا رَسُولَ اللَّهِ وَ لِمَ قَالَ إِنَّهُ لَيْسَ مِنْ قِطَارٍ إِلَّا وَ مَا بَيْنَ الْبَعِيرِ إِلَى الْبَعِيرِ شَيْطَانٌ .

6. It is narrated from the narrator of the previous Hadith from his father from those whom he has mentioned who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said that the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, prohibited to cross and intersect the row of camels. Someone asked, ‘Why is this, O Messenger of Allah?’ He (the Messenger of Allah) said, ‘In every row of camels between every two camels there is a Satan.’”