Tirmidhi

Commentary: 1؎ :
This hadith indicates that the Farewell Circumambulation (tawaf al-wada‘) is obligatory (wajib); this is the opinion of the majority of scholars.
They consider a compensatory sacrifice (dam) obligatory upon its omission.
Imam Malik,
Dawud, and Ibn al-Mundhir say that it is a Sunnah, and nothing becomes obligatory if it is omitted.
Note:

(This wording is rejected (munkar),
but its meaning is authentic through other chains,
and the wording 'aw i‘tamara' is not established.
In the chain, ‘Abd al-Rahman ibn Baylamani is weak,
and Hajjaj ibn Arta’ah is a mudallis and has narrated with ‘an‘anah.)

Benefits and Issues:
➊
The opinion of Umar radi Allahu anhu mentioned in this narration is contrary to the previous hadith.
(It is possible that the previous hadith was not known to him.) Therefore, the correct ruling is that which is established by the previous hadith.
However, it is clear that it is absolutely not permissible
for a person to seek fatwas here and there when there is an explicit and authentic command of the Messenger of Allah sallallahu alayhi wa sallam.
This is contrary to faith in the Messenger of Allah sallallahu alayhi wa sallam.

➋
This hadith indicates the excellence and virtue of Umar radi Allahu anhu and his zeal for following the Messenger.

➌
Shaykh al-Albani rahimahullah writes regarding this narration
that this narration is abrogated, and the preceding narration is the abrogator.