Third: hurting others by insulting, back biting or mocking them.
Fourth: fighting with others even while walking to the mosque.
One must not sit in another muslim’s place if one could not find enough place for himself; he should instead look for any empty spot available.
J?bir Ibn Abdill?h ( - رضي الله عنه -) related that the prophet ( - ) said: ‘No one should force his brother to move away from his place on Friday and sits in it; instead, one should [kindly] ask his brothers to make space for him’. (1)
An-Nawaw? said: ‘The order in the had?th shows prohibition. Accordingly, whoever comes to the mosque or any other place earlier and sits in a place on Friday or any other day, for the purpose of doing Sal?t or any other purpose, has more right in it. It is forbidden on any other muslim to force him move away from it -as the had?th states’. (2)
One is strongly recommended not to tresspass other muslims when coming late to the mosque -as Abdull?h’s Ibn Busr had?th states. It runs as follows: Once a man attended the mosque to perform the Jumu‘ah Sal?t with the prophet ( - ). He walked through the mosque trespassing other muslims while the prophet ( - ) is delivering his speech. Seeing this, the prophet ( - ) said: ‘Sit! you have indeed hurt others and have been late’. (3)
(1) Narrated by: Muslim in his “Sah?h” (vol. 14 / p. 161), Ahmad in “Al-Musnad” (vol. 6 / p. 70), Ibn Khuzaimah in his “Sah?h” (no. 1820) and Ash-Sh?fi‘? in “Al-’Umm” (vol. 1 / p. 235).
(2) “Sharh Sah?h Muslim” by An-Nawaw? (vol. 14 / p. 160) and “Al-’Umm” (vol. 1 / pp. 234 - 5).
(3) Narrated by: An-Nas?’? in “Al-Mujtab?” (vol. 1 / p. 207), Ab? D?w?d in “As-Sunnan” (no. 1118), Ahmad in “Al-Musnad” (vol. 4 / pp. 188 - 90), Al-H?kim in “Al-Mustadrak” (vol. 1 / pp. 278 - 88), Ibn Hibb?n in his “Sah?h” (vol. 4 / p. 199), Al-Baihaq? in “As-Sunnan Al-Kubr?” (vol. 3 / p. 231) and Ibn Khuzaimah in his “Sah?h” (no. 1811). The had?th is authentic.
See also: “Sah?h Al-J?m?‘ As-Sagh?r” (no. 155).