Ash-Shu'araa • BN-TAFSEER-IBN-E-KASEER
﴿ فَيَأْتِيَهُم بَغْتَةًۭ وَهُمْ لَا يَشْعُرُونَ ﴾
“that will come upon them [on resurrection,] all of a sudden, without their being aware [of its approach];”
Please check ayah 26:209 for complete tafsir.