Family and transmission
Salim ibn Abdullah ibn Umar was a hadith transmitter from the family of Umar ibn al-Khattab. He related traditions from his father, Abdullah ibn Umar; Hafsa bint Umar, a wife of Muhammad ﷺ, was his paternal aunt. His place in the succeeding generation distinguishes him from the companions who personally knew Muhammad ﷺ.
Source: TDV Encyclopaedia of Islam — Salim ibn ‘Abdullah · TDV Encyclopaedia of Islam — Salim ibn ‘Abdullah
Medinan jurisprudence
Salim appears in some lists of the seven jurists of Madinah. The seventh member is disputed: different accounts name Salim, Abu Salama ibn Abd al-Rahman, or Abu Bakr ibn Abd al-Rahman. These Tabi‘un jurists helped transmit the legal learning of the companions to subsequent Medinan scholars.
The group contributed to the formation of the Medinan legal tradition. Its jurists became known for transmitting reports, giving legal opinions, and addressing practical questions faced by their community. Membership in the traditional group should therefore be presented with its historical qualification, rather than as an undisputed fixed list.
Source: Cengiz Kallek: Fukahâ-yi Seb‘a — TDV İslâm Ansiklopedisi
