Qamar - 54:8

مُّهْطِعِينَ إِلَى الدَّاعِ يَقُولُ الْكَافِرُونَ هَذَا يَوْمٌ عَسِرٌ
[54:8]
Hastening to the inviter. The unbelievers shall say: This is a hard day.
Hastening, with eyes transfixed, towards the Caller!- "Hard is this Day!", the Unbelievers will say.
Hastening toward the summoner; the disbelievers say: This is a hard day.