What is the evidence for bearing witness that none has the right to be worshipped but Allah?

{ Allah witnesses that there is no deity except Him, and [so do] the angels and those of knowledge - [that He is] maintaining [creation] in justice. There is no deity except Him, the Exalted in Might, the Wise. }

{ So know, [O Muhammad], that there is no deity except Allah and ask forgiveness for your sin and for the believing men and believing women. And Allah knows of your movement and your resting place.}

{, and there is not any deity except Allah, the One, the Prevailing.}

{ Allah has not taken any son, nor has there ever been with Him any deity. }

{ Say, [O Muhammad], "If there had been with Him [other] gods, as they say, then they [each] would have sought to the Owner of the Throne a way." }