Ibn Abd al-Rahman bin Abza (may Allah have mercy on him) mentioned it. (b) Shu'bah (may Allah have mercy on him) said that Salamah (may Allah have mercy on him) did not remember whether he mentioned up to the palms or up to the elbows. (c) Shu'bah (may Allah have mercy on him) reported from Salamah (may Allah have mercy on him) concerning this narration that he said: I do not know whether it mentions the elbows or the palms.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1007