As-salaam wa-alaikum, brothers and sisters.
Today's selection concludes Surah 59, Al-Hashr or the Mustering, verses 18-24. These verses assert that the revelations of God could even affect a mountain and then concludes with the unique attributes of Allah.
Tafseer for this selection focuses on the affect God's word would have on a mountain itself in verse 21 and the summation of God's attributes in verse 22.