Sahih al-Bukhari preserves the report of two Companions who left the Prophet Muhammad peace and blessings be upon him on a very dark night and were accompanied by an extraordinary light. When they separated, the light also separated and guided each man. Bukhari's chapter and parallel transmissions identify them as Usayd ibn Hudayr may Allah be pleased with him and Abbad ibn Bishr may Allah be pleased with him, while another Bukhari version describes the lights as being like two lamps. Strong parallel routes in Ahmad, al-Nasa'i, and Ibn Hibban describe the light as shining from their staffs; these are variants of the same underlying event, not separate miracles.
The two men were Usayd ibn Hudayr may Allah be pleased with him and Abbad ibn Bishr may Allah be pleased with him. Bukhari's chapter material and parallel transmissions preserve their identification. While they were together, the light guided them along the same road. Then they reached the point where their paths separated. At that moment, the extraordinary sign also divided: each man was accompanied by a light that guided him on his own way.
Sahih al-Bukhari preserves the same underlying incident in more than one place. One version describes the lights as being like two lamps. A fuller set of parallel routes in Musnad Ahmad, al-Nasa'i al-Kubra, and Sahih Ibn Hibban gives the scene a slightly different form: the staff of one Companion shone, and after the two men separated, the other's staff also shone. Shu'ayb al-Arna'ut grades the Ibn Hibban route sahih on the condition of Muslim, and al-Hakim likewise gives a positive grading to a staff-light route.
These versions should not be turned into several different miracles. They are parallel transmissions of one event, preserving the same essential sequence: a very dark night, two Companions leaving the Prophet peace and blessings be upon him, an extraordinary light guiding them, and the light accompanying each separately after they parted. The lamp-like and illuminated-staff descriptions are route-level variants rather than contradictions that require an invented harmonization.
The strongest evidence-based conclusion is therefore clear. Sahih al-Bukhari itself preserves the extraordinary guiding-light event, and strong parallel hadith routes preserve fuller details. Classical Sunni transmission presents the incident as a karamah associated with Usayd ibn Hudayr and Abbad ibn Bishr, while the source record keeps the exact appearance of the light in more than one form.
Conclusion
Sahih al-Bukhari preserves the extraordinary guiding light that accompanied Usayd ibn Hudayr and Abbad ibn Bishr on a very dark night and separated with them when they parted. Strong parallel routes support the same event, giving it high-confidence inclusion as a companion karamah.