Muwatta Malik · Hadith 40

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ ابْنَ عُمَرَ، كَانَ يَنَامُ جَالِسًا ثُمَّ يُصَلِّي وَلاَ يَتَوَضَّأُ ‏.‏

Yahya related to me from Malik from Nafithat Ibn Umar used to sleep sitting and then would pray without doing wudu

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).