Tafsir Ibn Kathir (abridged)
The Disbelievers will remain in Doubt and Confusion
Allah tells us that the disbelievers will remain in doubt concerning this Qur'an. This was the view of Ibn Jurayj and was the view favored by Ibn Jarir.
حَتَّى تَأْتِيَهُمُ السَّاعَةُ بَغْتَةً
(until the Hour comes suddenly upon them,) Mujahid said: "By surprise." Qatadah said:
بَغْتَةً
(suddenly) means, the command of Allah will catch the people unaware. Allah never seizes a people except when they are intoxicated with pride, enjoying a life of luxury, and they think that the punishment will never come upon them, but Allah does not punish anyone except the evildoers.
أَوْ يَأْتِيَهُمْ عَذَابُ يَوْمٍ عَقِيمٍ
Continue reading the tafsir of ayahs 55–57