It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that indeed the Messenger of Allah, peace and blessings be upon him, said: "A person is upon the religion of his friend, so each of you should look carefully at whom he befriends."
Hadith Referenceمسند الشهاب / 187
Hadith Gradingمحدثین:إسناده حسن
Hadith Takhrij«إسناده حسن ، وأخرجه أبو داود : 4833، وترمذي : 2378، وأحمد : 2/ 303»