Al-Kāfi - Volume 4 > Prayers During the Journey
Hadith #3

3ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ قَاسِمٍ الصَّيْرَفِيِّ عَنْ حَفْصِ بْنِ الْقَاسِمِ قَالَ قَالَ أَبُو عَبْدِ الله (عَلَيْهِ السَّلاَم) إِنَّ عَلَى ذِرْوَةِ كُلِّ جِسْرٍ شَيْطَانٌ فَإِذَا انْتَهَيْتَ إِلَيْهِ فَقُلْ بِسْمِ الله يَرْحَلْ عَنْكَ.

3. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayr from al-Qasim al-Sayrafiy from Hafs ibn al-Qasim who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said, ‘On every bridge there is a Satan. When you approach him, say, ‘(I seek help) by the name of Allah.’ He moves away from you.’”