This Sacred Name is mentioned in the Holy Qur'an almost one thousand times...

This Sacred Name is mentioned in the Holy Qur'an almost one thousand times, which is more than any other name of His Holy Names. This name brings light in our heart, makes us firm and calm, and takes us into a world full of purity and serenity. The term /ahad/ is derived from /wahdah/, and some believe that /ahad/ and /wahid / are the same in many cases.

In this case, /ahad/ is interchangeable with /wahid/ when it is used as an epithet applied for Allah, because /al-ahad/, as an epithet, is applied to Allah alone, and signifies 'the One'; the Soul; He Who has always been one and alone; or the Indivisible; or He Who has no second (to share) in His Lordship,