It is narrated from Sayyiduna Khubayb (may Allah be pleased with him); he said: The Prophet (peace and blessings be upon him) set out intending an expedition, so I and a man from my people came and said: "We dislike that our people should take part in a battle in which we do not take part with them." He (peace and blessings be upon him) said: "Have you become Muslims?" We said: "No." He (peace and blessings be upon him) said: "We do not seek help from the polytheists." The narrator said: So we became Muslims and took part (in that battle) with him. A man from the polytheists struck me on my shoulder, and I killed him, and afterwards I married his daughter. She used to say: "May you never be deprived of the man who adorned you with this sash (meaning the scar of the wound)." And I would say to her: "May you never be deprived of the man who hastened your father to Hell."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4179
Sayyiduna Khubayb bin Isaf (may Allah be pleased with him) said: I and a man from my people came to the Messenger of Allah (peace and blessings be upon him) before we had accepted Islam, and we said: "We feel ashamed that our people should take part in a battle in which we do not take part with them." The Messenger of Allah (peace and blessings be upon him) said to us: "Have you become Muslims?" We said: "No." He (peace and blessings be upon him) said: "I do not seek help from the polytheists against the polytheists." So we became Muslims and took part (in that battle) with the Messenger of Allah (peace and blessings be upon him).
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4180
It is narrated from Sayyiduna Khubayb bin Isaf (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "I do not seek help from a polytheist."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4181