Having attributed the Tawhid of Essence, Attributes and actions to God, Tawhid in worship is confirmed for Him in the sense that only His Essence is worthy of worship, and if we consider anyone as His partner in worship, as the idol-worshipers and others do, it means that we are afflicted with polytheism in worship. The following verses of the Qur’an express this Tawhid in worship:
﴿ إِيَّاكَ نَعْبُدُ وَإِيَّاكَ نَسْتَعِينُ. ﴾
You {alone} do we worship, and to you {alone} do we turn for help.
And along this line, another verse states:
﴿ قُلْ إِنَّ صَلاَتِي وَنُسُكِي وَمَحْيَاي وَمَمَاتِي لِلَّهِ رَبِّ الْعَالَمِينَ. ﴾
Say, ’Indeed my prayer and my worship, my life and my death are all for the sake of Allah, the Lord of all the worlds’.
Tawhid in worship is understood from the phrase, “indeed my prayer and my worship” while Tawhid in Lordship {rububiyyahi} is discerned from the phrase, “my life and my death”.
Source:
A New Analysis of Wahhabi Doctrines
By: Muhammad Husayn Ibrahimi
ABWA Publishing and Printing Center
[Pg. 21-22].