Ibn Abbas said:

The apostle of allah ﷺ forbade drinking from the mouth of a water-skin, and riding the animal which feeds on filth and eating the animal which is killed in confinement.

Abu Dawud said: Jallalah means an animal which eats filth and impurities.

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا حَمَّادٌ، أَخْبَرَنَا قَتَادَةُ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ نَهَى رَسُولُ اللَّهِ ﷺ عَنِ الشُّرْبِ مِنْ فِي السِّقَاءِ وَعَنْ رُكُوبِ الْجَلاَّلَةِ وَالْمُجَثَّمَةِ . قَالَ أَبُو دَاوُدَ الْجَلاَّلَةُ الَّتِي تَأْكُلُ الْعَذِرَةَ .