المعارج — Al-Ma'arij Ayat 4

تَعْرُجُ الْمَلٰۤىِٕكَةُ وَالرُّوْحُ اِلَيْهِ فِيْ يَوْمٍ كَانَ مِقْدَارُهٗ خَمْسِيْنَ اَلْفَ سَنَةٍۚ

Ta‘rujul-malā'ikatu war-rūḥu ilaihi fī yaumin kāna miqdāruhū khamsīna alfa sanah(tin).

"The angels and the Spirit will ascend to Him during a Day the extent of which is fifty thousand years."