Ahmad recorded, with his chain whose narrators are the narrators of the Sahih, from Sayyiduna Uqbah bin Amir (may Allah be pleased with him), from the Prophet (peace and blessings be upon him), a report similar to this, except that its wording is: "If you exercise your reasoning (ijtihad) and judge correctly, you will get ten rewards; and if you exercise your reasoning and err, you will get one reward."
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأحكام / 7003
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه احمد فى المسند (205/4) عقب السابق)»