Surah Al-Ma'arij (The Pathways of Heavenly Ascent), Verse 4

تَعْرُجُ الْمَلٰٓىِٕكَةُ وَالرُّوْحُ اِلَیْهِ فِیْ یَوْمٍ كَانَ مِقْدَارُهٗ خَمْسِیْنَ اَلْفَ سَنَةٍ ۟

Ta'rujul malaaa'ikatu war Roohu ilaihi fee yawmin kaana miqdaaruhoo khamseena alfa sanah

“The angels and the spirit ascend unto him in a Day the measure whereof is (as) fifty thousand years:”

Quran 70:4 (Yusuf Ali Translation)