Once a married adulterer was brought to Sayyiduna Ali (may Allah be pleased with him). He flogged him with one hundred lashes on Thursday and stoned him to death on Friday. Someone asked him, "Why did you combine two punishments for him?" He replied, "I flogged him because of the Noble Qur'an, and I stoned him because of the Sunnah."
Hadith Referenceمسند احمد / مسند الخلفاء الراشدين / 941
Hadith Gradingحکم دارالسلام:إسناده صحيح، وفي خ: 6812، وهو مختصر بقصة رجم المرأة دون الجل