Sayyiduna Sa'd bin Mu'adh (may Allah be pleased with him) judged concerning Banu Qurayzah that the adults among them be killed and that the wealth and children be divided as spoils. This was mentioned to the Messenger of Allah (peace and blessings be upon him), and he (peace and blessings be upon him) said: "Sa'd has given the judgment that Allah made above the seven heavens."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18018