Some of them are listed below:
Muhaajireen & Ansaar
1. Hazrat Abu Bakr Siddeeq (radhiyallahu ‘anhu) and Hazrat Khaarijah bin Zaid (radhiyallahu ‘anhu)
2. Hazrat Umar bin Khattaab (radhiyallahu ‘anhu) and Hazrat Itbaan bin Maalik (radhiyallahu ‘anhu)
3. Hazrat Abu Ubaidah bin Jarraah (radhiyallahu ‘anhu) and Hazrat Sa’d bin Mu’aaz (radhiyallahu ‘anhu)
4. Hazrat Abdur Rahmaan bin Awf (radhiyallahu ‘anhu) and Hazrat Sa’d bin Rabee’ (radhiyallahu ‘anhu)
5. Hazrat Zubair bin Awwaam (radhiyallahu ‘anhu) Hazrat Salamah bin Salaamah bin Waqash (radhiyallahu ‘anhu)
6. Hazrat Uthmaan bin Affaan (radhiyallahu ‘anhu) and Hazrat Aws bin Thaabit (radhiyallahu ‘anhu)
7. Hazrat Talhah bin Ubaidullah (radhiyallahu ‘anhu) and Hazrat Ka’b bin Maalik (radhiyallahu ‘anhu)
8. Hazrat Sa’eed bin Zaid bin Amr bin Nufail (radhiyallahu ‘anhu) and Hazrat Ubayy bin Ka’b (radhiyallahu ‘anhu)
9. Hazrat Mus’ab bin Umair (radhiyallahu ‘anhu) and Hazrat Abu Ayyoob, Khaalid bin Zaid Ansaari (radhiyallahu ‘anhu)
10. Hazrat Abu Huzaifah bin Utbah and Hazrat Abbaad bin Bishr (radhiyallahu ‘anhu)
11. Hazrat Ammaar bin Yaasir (radhiyallahu ‘anhu) and Hazrat Huzaifah bin Yamaan (radhiyallahu ‘anhu)
12. Hazrat Abu Zar Ghifaari (radhiyallahu ‘anhu) and Hazrat Munzir bin Amr (radhiyallahu ‘anhu)
13. Hazrat Salmaan Faarsi (radhiyallahu ‘anhu) and Hazrat Abu Dardaa, Uwaymir bin Tha’labah (radhiyallahu ‘anhu)
14. Hazrat Bilaal and Hazrat Abu Ruwayhah, Abdullah bin Abdir Rahmaan (radhiyallahu ‘anhu)
15. Hazrat Haatib bin Abi Balta’ah (radhiyallahu ‘anhu) and Hazrat Uwaim bin Saa’idah (radhiyallahu ‘anhu)
16. Hazrat Abu Marthad and Hazrat Ubaadah bin Saamit (radhiyallahu ‘anhu)
17. Hazrat Abdullah bin Jahsh (radhiyallahu ‘anhu) and Hazrat Aasim bin Thaabit (radhiyallahu ‘anhu)
18. Hazrat Utbah bin Ghazwaan (radhiyallahu ‘anhu) and Hazrat Abu Dujaanah (radhiyallahu ‘anhu)
19. Hazrat Abu Salamah bin Abdil Asad (radhiyallahu ‘anhu) and Hazrat Sa’d bin Khaythamah (radhiyallahu ‘anhu)
20. Hazrat Uthmaan bin Maz’oon (radhiyallahu ‘anhu) and Hazrat Abul Haytham bin Tayhaan (radhiyallahu ‘anhu)
21. Hazrat Ubaidah bin Haarith (radhiyallahu ‘anhu) and Hazrat Umair bin Hammaam (radhiyallahu ‘anhu)
22. Hazrat Tufail bin Haarith (radhiyallahu ‘anhu) and Hazrat Ubaidah’s brother - Sufyaan Nasr Khazraji (radhiyallahu ‘anhu)
23. Hazrat Safwaan bin Baydhaa (radhiyallahu ‘anhu) and Hazrat Raafi’ bin Mu’allaa (radhiyallahu ‘anhu)
24. Hazrat Miqdaad (radhiyallahu ‘anhu) and Hazrat Abdullah bin Rawaahah (radhiyallahu ‘anhu)
25. Hazrat Zush-Shimaalain (radhiyallahu ‘anhu) and Hazrat Yazeed bin Haarith (radhiyallahu ‘anhu)
26. Hazrat Arqam (radhiyallahu ‘anhu) and Hazrat Talhah bin Zaid (radhiyallahu ‘anhu)
27. Hazrat Zaid bin Khattaab (radhiyallahu ‘anhu) and Hazrat Ma’n bin Adi (radhiyallahu ‘anhu)
28. Hazrat Amr bin Suraaqah (radhiyallahu ‘anhu) Hazrat Sa’d bin Zaid (radhiyallahu ‘anhu)
29. Hazrat Aaqil bin Bukair (radhiyallahu ‘anhu) and Hazrat Mubasshir bin Abdil Munzir (radhiyallahu ‘anhu)
30. Hazrat Khunais bin Huzaafah (radhiyallahu ‘anhu) and Hazrat Munzir bin Muhammed (radhiyallahu ‘anhu)
31. Hazrat Abu Saburah bin Abi Ruhm (radhiyallahu ‘anhu) and Hazrat Ubaadah bin Khashkhaash (radhiyallahu ‘anhu)
32. Hazrat Mistah bin Uthaathah (radhiyallahu ‘anhu) and Hazrat Zaid bin Mizyan (radhiyallahu ‘anhu)
33. Hazrat Ukkaashah bin Mihsan (radhiyallahu ‘anhu) and Hazrat Mujazzir bin Dammaar (radhiyallahu ‘anhu)
34. Hazrat Aamir bin Fuhayrah (radhiyallahu ‘anhu) and Hazrat Haarith bin Simmah (radhiyallahu ‘anhu)
35. Hazrat Mihja’ (radhiyallahu ‘anhu) - the slave of Hazrat Umar (radhiyallahu ‘anhu), and Hazrat Suraaqah bin Amr bin Atiyyah (radhiyallahu ‘anhu)
(Extracted from Seeratul Mustafa 1/437-439)