Surah Al-Ma'arij 70:4

تَعْرُجُ ٱلْمَلَـٰٓئِكَةُ وَٱلرُّوحُ إِلَيْهِ فِى يَوْمٍ كَانَ مِقْدَارُهُۥ خَمْسِينَ أَلْفَ سَنَةٍ

The angels and the Spirit [i.e., Gabriel] will ascend to Him during a Day the extent of which is fifty thousand years.

Translation: Saheeh International

Tafsir

To Him to the place in the heaven to which His command descends ascend read feminine person ta‘ruju or masculine person ya‘ruju the angels and the Spirit Gabriel in a day fī yawmin is semantically connected to an omitted clause that is to say ‘in a day in which the chastisement befalls them’ on the Day of Resurrection …

Excerpt from Tafsir al-Jalalayn, commentary on 70:4, via Quran.com. The reader has the full commentary and 9 more tafsirs.