Tabyin-ul-Kalam was an Urdu-language book. It was written around 1862 by Syed Ahmed Khan. It was written as a commentary on the Bible. It has a comparative study of Islam and Christianity in order to improve the relationship between British people and Muslims. He proved from this book the basic "similarities between Islam and Christianity".
In the first discourse of Tabyin-ul-Kalam, he deals with “the necessity of coming of Prophets to save mankind” based on Quranic studies. In the second volume of his Tabyin ul-Kalam, the advocacy of a non-literal reading of the Qur'an (and the Bible) is found.
Although due to lack of resources this work was not finished, yet it showed Syed's commitment to improve relations.