Quran 20:15 from Surah Taa-Haa on Divine Marvels.
إِنَّ ٱلسَّاعَةَ ءَاتِيَةٌ أَكَادُ أُخۡفِيهَا لِتُجۡزَىٰ كُلُّ نَفۡسِۭ بِمَا تَسۡعَىٰ
English translation: Indeed the Hour (will be) coming I almost [I] hide it that may be recompensed every soul for what it strives
Transliteration: inna al-sa'ata atiyatun akadu ukh'fiha lituj'za kullu nafsin bima tas'a