Surah Al-An'am (The Cattle), Verse 31

قَدْ خَسِرَ الَّذِیْنَ كَذَّبُوْا بِلِقَآءِ اللّٰهِ حَتّٰۤی اِذَا جَآءَتْهُمُ السَّاعَةُ بَغْتَةً قَالُوْا یٰحَسْرَتَنَا عَلٰی مَا فَرَّطْنَا فِیْهَا وَهُمْ یَحْمِلُوْنَ اَوْزَارَهُمْ عَلٰی ظُهُوْرِهِمْ اَلَا سَآءَ مَا یَزِرُوْنَ ۟

Qad khasiral lazeena kazzaboo biliqaaa'il laahi hattaaa izaa jaaa'at humus Saa'atu baghtatan qaaloo yaa hasratanaa 'alaa maa farratnaa feehaa wa hum yahmiloona awzaarahum 'alaa zuhoorihim; alaa saaa'a ma yaziroon

“Lost indeed are they who treat it as a falsehood that they must meet Allah,- until on a sudden the hour is on them, and they say: "Ah! woe unto us that we took no thought of it"; for they bear their burdens on their backs, and evil indeed are the burdens that they bear!”

Quran 6:31 (Yusuf Ali Translation)