The Relationship between the tawhid of ulūhiyya (exclusive worship) and the tawhid of rubūbiyya (Lordship), and vice versa:

The link between these two categories is that affirming the tawhid of rubūbiyya necessarily demands affirming the tawhid of ulūhiyya. In other words, once a person recognizes that Allah alone is his Lord, Creator, and the One who directs all his affairs, he is obligated to worship Him alone, without associating any partner with Him.