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wa-tammat kalimatu rabbika ṣidqan wa-ʿadlan lā mubaddila li-kalimātihī wa-huwa s-samīʿu l-ʿalīmu
The word of your Lord has been fulfilled in truth and justice. Nothing can change His words, and He is the All-hearing, the All-knowing.
— Ali Quli Qarai
Surah Al-‘An’am, Verse 115
115 . "And perfected is the Word of your Lord in truth and justice; there naught that can change His Words, and He is All-Hearing, All-Knowing.
In this verse, The Qur'an, addressing the Prophet (S), indicates that his Lord's Word was completed in truth and justice, so that no one change its containing words, and the Lord is All-Hearing, All-Knowing. The verse says:
The objective meaning of the term 'word', mentioned in the above verse, is 'The Qur'an', since in the former verses the subject matter was also recited upon 'The Qur'an'. Indeed, the verse refers to the fact that there is no doubt about Qur'an, because it is perfect and faultless in any respects. Its facts upon history and its information about events are all true, and its ordinances and laws are utterly just. Some of the commentators, attaching this verse, have reasoned the impossibility of influencing in perverting the Qur'an.
They say that phrase: "... There is naught that can change His Words ..." points to this fact that nobody is able to cast any change in the Qur'an, neither from point of the Arabic spelling of the words, nor from the point of information of the events, nor from the point of ordinances and laws.
Therefore, this heavenly Book, which must be the guide of humankind until the end of the world, will be secured and protected from the larceny of treacherous persons and distorters.