The ruling on adding "and there is no worshipped one but You" to the opening supplication

Question:
Honorable Shaykh, may Allah grant you success. A questioner says: Some of the people who pray add to the well-known opening supplication, "Subhanaka Allahumma wa bihamdika wa ta'ala jadduka wa la ilaha ghayruk," the phrase "wa la ma'bud siwak" (and there is no worshipped one but You). Is that permissible or not?

Answer:
This is an error. "There is no worshipped one but You" means that all things worshipped are servants of Allah the Exalted and Majestic, such as idols, trees, and stones; they are servants of Allah. "There is no worshipped one but You" must be qualified as "there is no worshipped one with truth but You." This qualification is necessary: "there is no worshipped one with truth but You."