Ash-Shu'araa • BN-TAFSEER-IBN-E-KASEER
﴿ قَالَ أَوَلَوْ جِئْتُكَ بِشَىْءٍۢ مُّبِينٍۢ ﴾
“Said he: “Even if I should bring about before thee something that clearly shows the truth?””
Please check ayah 26:37 for complete tafsir.