´Zaid bin Thabit narrated from his father :` who said that he saw the Prophet disrobing for his Ihlal and to perform Ghusl.
Related hadith on this topic
Explanation & Benefits
Shaykh Dr. Abdur Rahman Freywai
1:
This hadith indicates that performing a ritual bath (ghusl) for entering the state of ihram is recommended (mustahabb).
This is the opinion of the majority of scholars,
while some have considered it obligatory (wajib).
Note:
(In the chain of narration, Abdullah bin Ya'qub is of unknown status (majhul al-hal),
but due to supporting narrations and corroborating evidence, this hadith is classified as sahih li ghayrihi.)
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 830