One of the easiest and at the same time the most practical ways of investigating a text stylistically is to investigate the text from three points of view: Language, Thought and Literature. Accordingly, it is important to pay attention to phonetic, lexical and syntactic levels while investigating a literary text linguistically. This method has always been emphasized by the stylistic proponents, especially structural stylistics proponents. Taking this position in investigating the language of the literary text, its lexicons and sentences are analyzed from the viewpoints of collocation and substitution, making use of the archaic terms, brevity of expression, displacement of the sentence particles, selection of words with regard to collocation, kinds of adjectives and ellipsis of some items and … that lead to complication as well as bizarre uses and the reasons for such uses and if they lead to lack and damage of eloquence.Accordingly, in this research, the words and the sentences of Rahat Al-Sodoor and Ayat Al-Soroor by Ravandi are investigated from the point of view of eloquence and its weakness in lexicon as a stylistic technique for a better and clearer understanding of this literary text. Therefore, the weak eloquent points in the lexicon and sentences of the book are highlighted and then the ways they are used are extracted, explained and justified.For this aim, after a brief and general introduction to Rahat Al-Sodoor and Ayat Al-Soroor and its literary value, the samples extracted from the book are mentioned and then the weak points of eloquence are categorized on the basis of oratory books especially Ma’alem Al – Balagha, their frequency of each will be shown in statistical diagrams and finally the results of each are explained by practical reasons.