Sahih Muslim , Book 15, Hadith 157 (In-Book) ⓘ
Qatada narrated this hadith with the same chain of transmitters saying: (That 'Umar also said): Separate your Hajj from 'Umra, for that is the most complete Hajj, and complete your Umra.
وَحَدَّثَنِيهِ زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا عَفَّانُ، حَدَّثَنَا هَمَّامٌ، حَدَّثَنَا قَتَادَةُ، بِهَذَا الإِسْنَادِ وَقَالَ فِي الْحَدِيثِ فَافْصِلُوا حَجَّكُمْ مِنْ عُمْرَتِكُمْ فَإِنَّهُ أَتَمُّ لِحَجِّكُمْ وَأَتَمُّ لِعُمْرَتِكُمْ .
also referenced under: Hadith 1217 (Reference) & Book 7, Hadith 2801 (USC-MSA)