The Quran

104

قُل يا أَيُّهَا النّاسُ إِن كُنتُم في شَكٍّ مِن ديني فَلا أَعبُدُ الَّذينَ تَعبُدونَ مِن دونِ اللَّهِ وَلٰكِن أَعبُدُ اللَّهَ الَّذي يَتَوَفّاكُم ۖ وَأُمِرتُ أَن أَكونَ مِنَ المُؤمِنينَ

Muhammad Asad

SAY [O Prophet]: "O mankind! If you are in doubt as to what my faith is, then [know that] I do not worship those beings whom you worship beside God,¹ but [that] I worship God alone, who shall cause you [all] to die:² for I have been bidden to be among those who believe [in Him alone]."

Sc., "and call you to account on Judgment Day". The use of the pronoun alladhina in the phrase "those whom you worship" shows that it relates here to rational beings - like saints, etc. - and not to inanimate representations. As regards the term din (rendered here as "faith", see the first half of note 249 on 2:256.
The specific reference, in this context, to God as the One who causes all living beings to die is meant to impress upon "those who deny the truth" the fact that after their death they will be placed before Him for judgment.