Translated by Mawlana Bilal Ali Ansari
The ḥadīth “wuḍū’ upon wuḍū’ is light (nūr) upon light” is commonly transmitted by the jurists and recorded in their legal compendiums. It does not have any basis, however, amongst the scholars of ḥadīth.
Ḥāfiẓ ʿIrāqī states in his takhrīj work on Ghazzālī’s Iḥyā’ ʿUlūm al-Dīn: “I have found no basis for it.”
Similarly, ʿAllāmah Muḥammad Ṭāhir al-Fattanī in the end of his Majmaʿ al-Biḥār mentions that the ḥadīth “cannot be found (anywhere).”
Ḥāfiẓ Sakhāwī quotes his shaykh, Ibn Ḥajar al-ʿAsqalānī, in al-Maqāṣid al-Ḥasanah, as stating: “It is a ḍaʿīf ḥadīth. Razīn narrates it in his Musnad.”
[See pg.251-252 of ʿAbd al-Ḥayy al-Laknawī’s Ẓafar al-Amānī, Ed. ʿAbd al-Fattāḥ Abū Ghuddah. Maktab al-Maṭbūʿāt al-Islāmiyyah: Ḥalb, 1416AH.