Praise be to Allah, and peace and blessings be upon the Messenger of Allah.
Dividing Tawhid into categories is a scholarly and technical classification intended to clarify its meanings and make it easier to study. It does not mean that Tawhid itself is multiple or that each category represents a separate creed.
Scholars in various Islamic sciences have traditionally classified and organized subjects to make them easier to understand. Hence, it is said: “There should be no dispute over terminology” as long as the terminology is sound and does not lead to a false meaning.
One of the most common classifications divides Tawhid into three categories:
1. Tawhid ar-Rububiyyah (Oneness of Lordship):
This means affirming that Allah alone performs His divine actions, such as creating, providing sustenance, giving life, causing death, and governing all affairs, and believing that He is the Lord and Owner of everything.
2. Tawhid al-Uluhiyyah or al-‘Ibadah (Oneness of Worship):
This means directing all outward and inward acts of worship exclusively to Allah, such as supplication, prayer, reliance, fear, and hope. None is to be worshipped except Allah.
3. Tawhid al-Asma’ wa as-Sifat (Oneness of Allah’s Names and Attributes):
This means believing in the names and attributes that Allah has affirmed for Himself and that His Messenger ﷺ affirmed for Him, in a manner befitting Allah, without distortion, denial, or likening Him to His creation.
Some scholars combine these meanings into two categories. The first is Tawhid of knowledge and affirmation, which includes Lordship and Allah’s Names and Attributes. The second is Tawhid of intention and worship, which means worshipping Allah alone.
Some scholars may classify them in greater detail and consider belief in the existence of Allah as a separate category, making the classification four categories.
There is no real contradiction between these classifications, because those who divide Tawhid into two categories summarize what others explain in three or four. The fundamental meanings remain the same.
These categories were not introduced to add anything new to the Islamic creed. Rather, their meanings were derived from the Qur’an and Sunnah in order to make Tawhid easier to understand and teach.
In summary: The difference in the number of categories of Tawhid is a difference in classification and explanation, not a disagreement about the reality of Allah’s Oneness. All these classifications ultimately refer to belief in Allah and His Lordship, worshipping Him alone, and believing in His Names and Attributes.
And Allah knows best.