Sunan an-Nasa'i 3724
سنن النسائي#3724SahihIt was narrated from 'Abdullah bin 'Abbas that the Prophet said:"'Umra is permissible
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 34:6