Muwatta Malik · Hadith 319
وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ جَابِرَ بْنَ عَبْدِ اللَّهِ، كَانَ يُصَلِّي فِي الثَّوْبِ الْوَاحِدِ .
Yahya related to me from Malik that he had heard that Jabir ibn Abdullah used to pray in one garment
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).