Shama-il Tirmidhi Chapter 16, Hadith Number 1 (107).

Hazrat Jabir radiyallahu anhu reports that when Makkah was conquered, Rasoolullah sallallahu alaihe wasallam entered the city wearing a black turban.

This hadith seems to contradict the previous ahaadith (mentioned in the previous chapter on the helmet of Sayyidina Rasoolullah sallallahu alaihe wasallam, wherein it is stated that Sayyidina Rasoolullah sallallahu alaihe wassallam wore a helmet and entered Makkah. In reality there is no difference. It is not impossible to wear a turban on a helmet. Both hadith can be summed up easily. Some Ulama say that when he entered Makkah he wore a helmet. As soon as he removed the helmet, he wore a turban. Therefore in that narration, the time of entry is mentioned since the time was appropriate. Some Ulama are of the opinion that because a metal head cover may have been troublesome, he may have worn a turban beneath it.