"The Holy Qur'an is closely connected with the knowledge, thought, action, and speech of the Prophet of God (PBUH) and the Infallible Imams (AS), to the extent that they have been described as the 'Speaking Qur'an.' The speech of Imam Sajjad, Ali ibn al-Husayn (AS), in Sahifa al-Sajjadiyya is likewise. Although in many cases this relationship has not been clarified, if its realization is possible in a part of the speech, it may well be the case in other parts and consequently in all of the speech. The method of searching for the origin and sources of a work and a text is one of the features of traditional and authentic criticism, and for centuries it has been an important criterion for its evaluation. However, in the present era, these investigations are conducted in a new discipline within linguistics and literary criticism known as intertextuality. This discipline, despite differences in foundations, methods, and so on, can still be taken into consideration. In this research, using a descriptive-analytical method, the connection of the 47th supplication of Sahifa al-Sajjadiyya with the Holy Qur'an was examined and identified through the common method of intertextuality. It was found that Imam Sajjad (AS), while directly reproducing Qur'anic phrases verbally (partial negation), making morphological-syntactic changes and semantic expansion (parallel negation), and at deeper layers, has presented Qur'anic themes with doctrinal and ethical concepts. In addition, he has also raised principles of theology in the form of supplication. It became clear that the text of the 47th supplication of Sahifa al-Sajjadiyya is an example of the relationship of the speech of the Infallibles with the Holy Qur'an, and this adds to its sublime validity, great majesty, and abundant freshness."