Ruboobiyyah Necessitates Uloohiyyah
How can you admit that Allah is the true Rabb and yet direct acts of worship to other than Him? Once it is established that Allah is the Rabb, the next logical step is to worship Him alone, however many people do not take this step. This is the basic theme of the Quran and this is the message of all the Prophets.
Allah (swt) uses their belief in His Lordship as proof against them in their acts of shirk. He mentions their belief in Him as proof against their worship of others in the following ayaat:
Say (O Muhammad SAW): “Praise and thanks be to Allah, and peace be on His slaves whom He has chosen (for His Message)! Is Allah better, or (all) that you ascribe as partners (to Him)?” (Of course, Allah is Better). Is not He (better than your gods) Who created the heavens and the earth, and sends down for you water (rain) from the sky, whereby We cause to grow wonderful gardens full of beauty and delight? It is not in your ability to cause the growth of their trees. Is there any ilah (god) with Allah? Nay, but they are a people who ascribe equals (to Him)! Is not He (better than your gods) Who has made the earth as a fixed abode, and has placed rivers in its midst, and has placed firm mountains therein, and has set a barrier between the two seas (of salt and sweet water).Is there any ilah (god) with Allah? Nay, but most of them know not. Is not He (better than your gods) Who responds to the distressed one, when he calls Him, and Who removes the evil, and makes you inheritors of the earth, generations after generations. Is there any ilah (god) with Allah? Little is that you remember! Is not He (better than your gods) Who guides you in the darkness of the land and the sea, and Who sends the winds as heralds of glad tidings, going before His Mercy (rain)? Is there any ilah (god) with Allah? High Exalted be Allah above all that they associate as partners (to Him)! Is not He (better than your so-called gods) Who originates creation, and shall thereafter repeat it, and Who provides for you from heaven and earth? Is there any ilah (god) with Allah? Say, “Bring forth your proofs, if you are truthful.” (Naml 27:59-64)
Throughout these verses Ruboobiyyah is linked to Uloohiyyah. Rhetorical questions about Ruboobiyyah then ends it with an ayah of uloohiyyah. So He established their Ruboobiyyah and then challenges their uloohiyyah. There are hundreds of verses where this link is shown.
When reading through the Qur’aan, notice how Allah (swt) often mentions manifestations of His lordship (ruboobiyya) after calling upon people to worship Him alone (uloohiyyah).
O mankind! Worship your Lord (Allah), Who created you and those who were before you so that you may become Al-Muttaqun. (2:21)