Jami` at-Tirmidhi 931
جامع الترمذي#931Da'ifJabir narrated that:The Prophet was asked about whether Umrah was obligatory? He said: "No. But if you perform Umrah it is more virtuous
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirDaif Isnaad
Al-AlbaniDaif Isnaad
Zubair Ali ZaiDaif
In-book reference: 9:124