Az-Zumar • BN-TAFSEER-IBN-E-KASEER
﴿ قُرْءَانًا عَرَبِيًّا غَيْرَ ذِى عِوَجٍۢ لَّعَلَّهُمْ يَتَّقُونَ ﴾
“as a discourse in the Arabic tongue, free of all deviousness, so that they might become conscious of God.”
Please check ayah 39:31 for complete tafsir.