The Quran

قُل يا أَهلَ الكِتابِ تَعالَوا إِلىٰ كَلِمَةٍ سَواءٍ بَينَنا وَبَينَكُم أَلّا نَعبُدَ إِلَّا اللَّهَ وَلا نُشرِكَ بِهِ شَيئًا وَلا يَتَّخِذَ بَعضُنا بَعضًا أَربابًا مِن دونِ اللَّهِ ۚ فَإِن تَوَلَّوا فَقولُوا اشهَدوا بِأَنّا مُسلِمونَ

Muhammad Asad

Say: "O followers of earlier revelation! Come unto that tenet which we and you hold in common:¹ that we shall worship none but God, and that we shall not ascribe divinity to aught beside Him, and that we shall not take human beings for our lords beside God."² And if they turn away, then say: "Bear witness that it is we who have surrendered ourselves unto Him."

Lit., "a word [that is] equitable between you and us". The term kalimah, primarily meaning "word" or "utterance", is often used in the philosophical sense of "proposition" or "tenet".
Lit., "that we shall not take one another for lords beside God". Since the personal pronoun "we" obviously applies to human beings, the expression "one another" necessarily bears the same connotation. In its wider implication, the above call is addressed not merely to the Christians, who attribute divinity to Jesus and certain aspects of divinity to their saints, but also to the Jews, who assign a quasi-divine authority to Ezra and even to some of their great Talmudic scholars (cf. 9:30-31).