Bulugh al-Maram, Book 6, Hadith 730 (English)

Jabir bin 'Abdullah (RAA) narrated, A Bedouin came to the Prophet and said, ‘O Messenger of Allah! Tell me about 'Umrah! Is it compulsory? He replied, “No (it is not compulsory), but it is better for you to perform it.” Related by Ahmad and at-Tirmidhi. Scholars are of the opinion that it is Mawquf.

وَعَنْ جَابِرِ بْنِ عَبْدِ اَللَّهِ رَضِيَ اَللَّهُ عَنْهُمَا قَالَ: { أَتَى اَلنَّبِيَّ ‏- صلى الله عليه وسلم ‏-أَعْرَابِيٌّ.‏ فَقَالَ: يَا رَسُولَ اَللَّهِ! أَخْبِرْنِي عَنْ اَلْعُمْرَةِ, أَوَاجِبَةٌ هِيَ? فَقَالَ: " لَا.‏ وَأَنْ تَعْتَمِرَ خَيْرٌ لَكَ " } رَوَاهُ أَحْمَدُ, وَاَلتِّرْمِذِيُّ, وَالرَّاجِحُ وَقْفُهُ 1‏.‏ ‏1 ‏- ضعيف مرفوعا وموقوفا.‏ رواه أحمد ( 3 / 316 )‏، والترمذي ( 931 )‏.‏

sunnah.com

also referenced under: Book 6, Hadith 3 (In-Book)

Ibn 'Adi narrated with a weak chain of narrators on the authority of Jabir (RAA) in a Hadith Marfu’ (connected to the Prophet, “Hajj and 'Umrah are compulsory."

وَأَخْرَجَهُ اِبْنُ عَدِيٍّ مِنْ وَجْهٍ آخَرَ ضَعِيفٍ 1‏ عَنْ جَابِرٍ مَرْفُوعًا: { اَلْحَجُّ وَالْعُمْرَةُ فَرِيضَتَانِ } 2‏.‏ ‏1 ‏- ضعيف جدا.‏ رواه ابن عدي ( 7 / 2507 )‏ وفي سنده متروك.‏ ‏2 ‏- ضعيف.‏ رواه ابن عدي في " الكامل " ( 4 / 1468 )‏ وضعفه.‏

sunnah.com

also referenced under: Book 6, Hadith 4 (In-Book)