﴿ إِنَّ ٱلسَّاعَةَ ءَاتِيَةٌ أَكَادُ أُخْفِيهَا لِتُجْزَىٰ كُلُّ نَفْسٍۭ بِمَا تَسْعَىٰ ﴾

“"Behold, [although] I have willed to keep it hidden, the Last Hour is bound to come, so that every human being may be recompensed in accordance with what he strove for [in life].”

Please check ayah 20:16 for complete tafsir.