It is narrated from Sayyiduna Ibn Amr (may Allah be pleased with him) that on the occasion of the conquest of Makkah, the Noble Prophet (peace and blessings be upon him) said: "Withhold your weapons from everyone except the Banu Khuza'ah." Then the narrator mentioned the complete hadith and said: "Fulfill the agreements of the time of ignorance, for Islam has only increased their strength. However, do not make any new agreements in Islam."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 6992
Hadith Gradingحکم دارالسلام:إسناده حسن، ولبعضه شواهد يصح بها.