Which was revealed in Makkah

بِسْمِ اللَّهِ الرَّحْمَـنِ الرَّحِيمِ

In the Name of Allah, the Most Gracious, the Most Merciful.

تَعْرُ‌جُ الْمَلَائِكَةُ وَالرُّ‌وحُ (to whom ascend the angels and the Spirit ...70:4). In other words, the angels and Jibra'il (علیہ السلام) ascend these levels which are one on top of the other. Although the word 'angels' include 'Jibra'il (علیہ السلام) ، his name is singled out specifically on account of his special honour.

فِي يَوْمٍ كَانَ مِقْدَارُ‌هُ خَمْسِينَ أَلْفَ سَنَةٍ ( in a day the length of which is fifty thousand years…70:4).This statement, grammatically, is connected to an understood verb, which is yaqa'u [ will occur ]. The sense is that the inevitable punishment mentioned earlier will occur on a day the measure of which is fifty thousand years. Sayyidna Abu Said Khudri ؓ narrates that the blessed Companions asked the Holy Prophet ﷺ about the length of the day that measures fifty thousand years. He replied: "I swear by the Being in Whose control is my life! The day for the believers will be lighter and less than the time during which they would perform an obligatory salah." (Transmitted by Ahmad, Abu Yala, Ibn Hibban, Baihagi through a 'an' chain of narrators - Mazhari)