The Earth is wrapped up...
Al-Kāfi|Volume 8|Book 1|Chapter 489
عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ النَّوْفَلِيِّ عَنِ السَّكُونِيِّ عَنْ أَبِي عَبْدِ اللَّهِ (عليه السلام) قَالَ قَالَ رَسُولُ اللَّهِ (صلى الله عليه وآله) عَلَيْكُمْ بِالسَّفَرِ بِاللَّيْلِ فَإِنَّ الْأَرْضَ تُطْوَى بِاللَّيْلِ.
489. Ali Bin Ibrahim, from his father, from Al-Nowfaly, from Al-Sakuny, who has narrated the following: Abu Abdullah عليه الصلاة والسلام has said: ‘The Rasool Allah صلى الله عليه وعلى آله وسلم said: ‘It is on you to travel at night, for the ground folds up at night’.
- Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (16/414)
- Ṣaḥīḥ al-Kāfī