It is narrated from Sayyidah Umm Habibah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever prays four rak'ahs before Zuhr, Allah will make his body forbidden to the Fire of Hell."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19750