These (Lat, Uzza and Manat) are nothing but names which you and your forefathers have invented, for Allah has vested no authority in them. The unbelievers follow nothing but mere conjecture and the whims of their own souls, even though right guidance has already come to them from their Lord.
Meaning:-
Al-Uzza, Al-Lat and Menat (Arab Deities) : Three of them are referred to as the daughters of Allah. The Goddesses Al-Uzza, Al-Lat and Menat was most venerated Arab Deities. They were widely worshipped, and the three of them were very popular Goddesses in Mecca at the time of prophet Mohammed (PBUH).
vested:held completely, permanently.
Conjecture: speculation, guesswork, assumption.
Whim: a sudden wish or idea, especially one that cannot be reasonably explained