Some examples:
•“Whoever says subhaanAllahi wa bihamdihi 100 times in a day, his sins will be forgiven even if they were like the froth of the ocean” [Agreed upon]
•“There are two phrases which are light upon the tongue, heavy in the scale, and beloved to Ar-Rahmaan: subhaanAllahi wa bihamdihi, subhaanAllahil ‘adheem” [Agreed upon]
•“Four phrases are most beloved to Allah, and it doesn’t matter which one you start with: subhaanAllah, alhamdulillah, laa ilaaha illAllah, and Allahu akbar” [Muslim]
The most beloved names to Allah are the names Abdullah and AbdurRahmaan, as found in the saheeh hadith. Ibnul Qayyim explained in Zaad al Ma’aad (2/340):
As far as a name is related to the one that is named by it and affected by it, the names that Allah loves most are the names related to the Attributes that He loves most, like Abdullah and AbdurRahmaan. He loves that one would join worship to the names Allah and Al-Rahmaan more than than joining it to other names like Al-Qaahir and Al-Qaadir… This is because the relationship between the worshipper and Allah is one of absolute worship and absolute mercy from Him. It is by His Mercy that the worshipper exists, and everything related to his existence is due to Allah’s Mercy. He created and made the worshipper to exist in order that He is worshipped alone, loved, feared, hoped in, revered, and glorified. Then [the person] becomes a worshipper of Allah, worshipping Him because the name Allah means that He should be worshipped, and because of the impossibility that this meaning could be given to anyone else.?Allah’s mercy overcame His anger[as mentioned in the hadith], so He loves the name AbdurRahmaan more than the name AbdulQaahir.
The name Allah is the most comprehensive name because it contains the meanings present in all other names. Every other name signifies some specific attribute but not necessarily other attributes. However, the name Allah indicates that due to the fact that He has all these names and attributes, He alone is deserving to be worshipped. All other names explain and detail the attributes of Allah.
Whenever other names are mentioned, they are are listed as “among the names of Allah”. For example, “Al-Rahmaan, Al-Raheem, and Al-Ghaffaar are among the names of Allah”. No one says “Allah is one of the names of Al-Rahmaan.”
Allah Himself said: “Allah’s are the most beautiful names. Invoke Him by them.” [7:180]
All of the Messengers invited the people to the fact that only Allah deserves to be worshipped: “And We sent not before you any messenger except that We revealed to him that, ‘There is no deity except Me, so worship Me.’” (21:25)
Some ayaat that mention that only Allah deserves to be worshipped; that He is the only ilaah:
And your god is one God. There is no deity [worthy of worship] except Him, the Entirely Merciful, the Especially Merciful.(2:163)