Shama-il Tirmidhi Chapter 21, Hadith Number 4 (126).

Jaabir bin Samurah radiyallahu anhu says: “I had seen Rasulullah sallallahu alaihe wasallam lean on a pillow.”

Commentary.
This is the same Hadith mentioned at the beginning of the chapter. The author wanted to comment on this Hadith, therefore it is mentioned here.