لَا تَغْلُوا۟ فِى دِينِكُمْ غَيْرَ ٱلْحَقِّ

4:172.

Commentary:

The words ولاتقولوا (and say not or speak not) may be taken to be understood before the words غیرالحق (which have been translated in the text as "unjustly" but which also mean an untruth), for it is the false doctrines of Christians that, more than their actions, have contributed to the corruption of their faith and their spiritual degradation. In this case, the verse would read thus: "Say, O People of the Book, exceed not the limits in the matter of your religion and speak not an untruth."

The words, nor follow the evil inclinations of a people who went astray before, indicate that the doctrines of Trinity, Atonement and Sonship are really borrowed doctrines. Having borrowed them from the nations that "went astray before", early Christian religious leaders made such alterations in their own doctrines as made them acceptable to the heathen nations with whom they came in contact. Modern research into the sources of Christianity goes to establish the truth of this Quranic statement made more than thirteen hundred years ago (Enc. Bib., col. 4695 Enc. R. Eth., vol. ii, p. 143; vol. vii, p. 436).