It is narrated from Hazrat Umm Habibah (may Allah be pleased with her) that the Prophet (peace and blessings of Allah be upon him) said: "Whoever performs four rak'ahs before Zuhr and four rak'ahs after it, Allah will make his flesh forbidden for Hell."
Hadith Referenceمسند احمد / من مسند القبائل / 27403
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف لجهالة عبدالله بن المهاجر