In the narration reported from Khalid there are a few additional words, namely: "where his hands spent the night, upon which part (of his body)."
(b) Muhammad bin al-Walid al-Busri is alone in narrating the addition "minhu" (of it).
(c) He is a trustworthy (thiqah) narrator. And Allah knows best.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 207