1051. hadíth
وَقَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: فِي اَلصَّلاَةِ فِي اَلْمَحْمِلِ «صَلِّ مُتَرَبِّعاً وَ مَمْدُودَ اَلرِّجْلَيْنِ وَ كَيْفَ مَا أَمْكَنَكَ.
Imam Jafar ibn Muhammad Al-Sadiq (a.s) said regarding prayer in a carriage (mahmil), "Pray sitting cross-legged (tawarruk), with your legs extended, or in whatever manner is possible for you."