1327. hadíth
وَ سَأَلَهُ هَارُونُ بْنُ حَمْزَةَ اَلْغَنَوِيُّ: عَنِ اَلصَّلاَةِ فِي اَلسَّفِينَةِ فَقَالَ «إِنْ كَانَتْ مُحَمَّلَةً ثَقِيلَةً إِذَا قُمْتَ فِيهَا لَمْ تَتَحَرَّكْ فَصَلِّ قَائِماً وَ إِنْ كَانَتْ خَفِيفَةً تَكَفَّأُ فَصَلِّ قَاعِداً.
Harun ibn Hamzah al-Ghanawi asked him (Abu Abdullah (a.s)) about praying on a ship. Imam (a.s) said: "If it is heavily loaded and does not move when you stand, then pray standing. But if it is light and unstable, then pray seated."