Even if there were no Ayaat or Ahadith relating to Dhikr, we should not have forgotten to remember our real Benefactor, whose blessings and favours on us at all times are unlimited, and have no parallel. It is but natural that we should remember our Benefactor, perform His dhikr (remember Him), and thank Him. Countless virtues of dhikr are described in the Quran and Ahadith, and the sayings and deeds of our elders in support thereof are available for our benefit. No doubt, the blessings of the glorious dhikr of Allah are unlimited and its effulgence is so sublime.
(Virtues of Dhikr, Shaykh Zakariyyah Khandhelawi)