Ash-Shu'araa • BN-TAFSEER-IBN-E-KASEER
﴿ قَالَ وَمَا عِلْمِى بِمَا كَانُوا۟ يَعْمَلُونَ ﴾
“Said he: “And what knowledge could I have as to what they were doing [before they came to me]?”
Please check ayah 26:115 for complete tafsir.