Some companions used to live in the masjid and dedicated every waking moment to the cause Islam. The area in the masjid of the Prophet where lived was called the Suffah. These companions were usually the first responders.
Here is a list of some of the companions who used to live in the suffah.
37Abu Ubaydah b. Jarrah
36Ammar b. Yasir
35Abdullah b. Mas’ud
34Miqdad b. Amr al-Kindi
33Khabbab b. Arat
32Bilal b. Rabah
31Suhayb b. Sinan
30Zayd b. Khattab
29Abu Marthad b. Husayn al-Adawi
28Safwan b. Bayda’
27Abu ‘Abs b. Jabr
26Salim Mawla Huzayfah
25Mistah b. Athathah
24Ukashah b. Mihsan
23Mas’ud b. Rabi’
22Hajjaj b. Amr Aslami
21Abu Hurayrah al-Dawsi
20Thawban Mawla Rasulullah
19Umayr b. Awf
18Uwaym b. Sa’idah
17Abu Lubabah
16Salim b. Umayr
15Abu Bishr Ka’b b. Umar
14Khubayb b. Sayyaf
13Abdullah b. Unays
12Abu Zarr Ghifari Jundub b. Junadah
11Utbah b. Mas’ud Huzali
10Abdullah b. Umar
9Salman Farsi
8Huzayfah b. Yaman
7Abu Darda’ Uwaymir b. Amir
6Abdullah b. Zayd Juhani
5Mu’az b. Harith
4Sa’ib b. Khallad
3Thabit Wadi’ah
Hulyat al-Awliyah has a more comprehensive list. The number is said to be between 40-400.
