What is the meaning of “the text of ‘aqeedah”?
Question

                What does “the text of the ‘aqeedah (matn al-‘aqeedah)” mean?.
Praise be to Allah.Al-matn (text) in Arabic 
    means the back. In Islamic terminology it refers to the contents of a book, 
    such as the text of Saheeh al-Bukhaari or the text of Zaad 
    al-Mustaqni’. 
The scholars usually use 
    this word to refer to brief books that are in circulation among the scholars 
    and seekers of knowledge in a particular field of knowledge. For example, in 
    the case of ‘aqeedah (tenets of faith), they may say Matn al-Waasitiyyah, 
    referring to the brief book on ‘aqeedah by Shaykh al-Islam Ibn Taymiyah, 
    which is called al-‘Aqeedah al-Waasitiyyah. Similarly, Matn 
    al-Tahhaawiyyah refers to a brief book on ‘aqeedah by Imam al-Tahhaawi. 
Usually what is meant by 
    the word matn (text) is to distinguish the book from its commentary. For 
    example they may say Matn al-Tahhaawiyyah to distinguish it from 
    Sharh al-Tahhaawiyyah (the commentary on al-Tahhaawiyyah), which 
    is another book in which Ibn Abi’l-‘Izz al-Hanafi commented on the original 
    short book, al-‘Aqeedah al-Tahhaawiyyah. 
Mutoon (pl. of matn) or 
    texts are usually short but contain many meanings and important principles 
    of knowledge which are written about in brief terms to make it easy to 
    memorize them and focus on issues of knowledge. Imam al-Bukhaari (may Allaah 
    have mercy on him) said: al-Khaleel ibn Ahmad said: Words may be made brief 
    in order to memorize them and made long in order to understand. Khalq 
    Af’aal al-‘Ibaad, no. 244. 
And Allaah knows best.