Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates that the Prophet (peace and blessings be upon him) said: "Whoever denies destiny (qadar) has denied what was revealed to Sayyiduna Muhammad (peace and blessings be upon him)."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains a narrator, Muhammad bin al-Husayn al-Qassas, whom I do not know, and the rest of its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب القدر / 11877
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«أخرجه المعجم الأوسط للطبراني برقم: 8294»