Sayyiduna Amr bin Awf (may Allah be pleased with him) reports this saying of the Prophet (peace and blessings be upon him): "There is to be no secret theft and no embezzlement (from the spoils of war). Whoever embezzles will bring what he embezzled on the Day of Resurrection."
Al-Tabarani recorded it. Its chain contains a narrator, Kathir bin Abdullah al-Muzani, who is da'if (weak), though al-Tirmidhi graded his hadith hasan (good). The remaining narrators of this report are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الجهاد / 9744