In Surah Naas, Allah says:
The key phrases I want to focus on are "rabbi an-naas" and "maliki an-naas." I will explain shortly.
First, in 'aqeedah, we study two topics: tawheed of Allah's rububiyyah (his Lordship) -- that he is the Creator, the Sustainer, and Provider of the human race.
Second is the topic of Allah's uloohiyyah -- that He is the only one worthy of worship (laa ilaaha illa Allah) -- we pray to Him, make du'a to Him, sacrifice for His sake, and all this to Him alone.
Ayah #3 establishes Allah's uloohiyyah and links the concepts of rububiyyah and uloohiyyah. Sure. But my question is, what are the benefits to mentioning two qualities of Allah's rububiyyah in this surah?
If the goal was to illustrate and link rububiyyah to uloohiyyah, one of the two qualities would suffice -- rabb an-naas, or maalik an-naas. However, both together seems to hint at something deeper.
Also, please clarify the meaning of "malik" in the Qur'an, as it refers to Allah.