This is the 30th verse of Sura 70, Quran.
This translation is given my the most respected Islamic scholar, Tafsir Al-Jalalayn.
http://www.altafsir.com/Tafasir.asp?tMadhNo=0&tTafsirNo=74&tSoraNo=79&tAyahNo=30&tDisplay=yes&UserProfile=0&LanguageId=2
The source I gave is from Institute for...