Sura Ibrāhīm 14:38

رَبَّنَآ إِنَّكَ تَعْلَمُ مَا نُخْفِى وَمَا نُعْلِنُ وَمَا يَخْفَىٰ عَلَى ٱللَّـهِ مِن شَىْءٍ فِى ٱلْأَرْضِ وَلَا فِى ٱلسَّمَآءِ

rabbanā innaka taʿlamu mā nukhfī wa-mā nuʿlinu wa-mā yakhfā ʿalā allāhi min shayʾin fī l-arḍi wa-lā fī l-samāʾi

"O our Lord! truly Thou dost know what we conceal and what we reveal: for nothing whatever is hidden from Allah, whether on earth or in heaven.

Sura Ṭā Hā 20:15

إِنَّ ٱلسَّاعَةَ ءَاتِيَةٌ أَكَادُ أُخْفِيهَا لِتُجْزَىٰ كُلُّ نَفْسٍۭ بِمَا تَسْعَىٰ

inna l-sāʿata ātiyatun akādu ukhfīhā li-tujzā kullu nafsin bi-mā tasʿa

"Verily the Hour is coming - My design is to keep it hidden - for every soul to receive its reward by the measure of its Endeavour.