It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: The agreements and covenants made during the Age of Ignorance have been further strengthened and reinforced by Islam.
Hadith Referenceالفتح الربانی / أهم أحداث السنة الأولى للهجرة / 10662