Hadith[edit]
Only pious Muslims where Muhammad's friends[edit]
'Amr b. 'As reported: I heard it from the Messenger of Allah (may peace be upon him) quite audibly and not secretly: Behold! the posterity of my fathers, that is, so and so, are not my friends. Verily Allah and the pious believers are my friends.
Sahih Muslim 1:417
Using the Qur'an, Umar kicked a Christian out of Medina[edit]
(And if any among you befriends them, then surely he is one of them.) Ibn Abi Hatim recorded that `Umar ordered Abu Musa Al-Ash`ari to send him on one sheet of balance the count of what he took in and what he spent. Abu Musa then had a Christian scribe, and he was able to comply with `Umar's demand. `Umar liked what he saw and exclaimed, "This scribe is proficient. Would you read in the Masjid a letter that came to us from Ash-Sham" Abu Musa said, `He cannot."
`Umar said, "Is he not pure Abu Musa said, "No, but he is Christian." Abu Musa said, "So `Umar admonished me and poked my thigh (with his finger), saying, `Drive him out (from Al-Madinah).' He then recited,"
(O you who believe! Take not the Jews and the Christians as friends...) Then he reported that `Abdullah bin `Utbah said, "Let one of you beware that he might be a Jew or a Christian, while unaware." The narrator of this statement said, "We thought that he was referring to the Ayah,
Narrated AbuHurayrah: "The Prophet (peace be upon him) said: A man follows the religion of his friend; so each one should consider whom he makes his friend."
Abu Dawud 41:4815
Only stay with Muslims[edit]
Narrated AbuSa'id al-Khudri: The Prophet (peace be upon him) said: Associate only with a believer, and let only a God-fearing man eat your meals.
Abu Dawud 41:4814 , See also:
Abu Dawud 41:4832
Whoever joins a polytheist is like him[edit]
“Whoever joins a mushrik and lives with him is like him"
Abu Dawud: 2787
Do not take enemies as friends[edit]
"O you who believe! Take not my enemies And your enemies as friends offering them (Your) love even though they have disbelieved in that Truth (i.e. Allah, Prophet Muhammad and this Quran) which has come to you."