When is the standing (prayer) during the last ten days of the month of Ramadan?

The time for Qiyam al-Layl (night prayer), both in the last ten nights [of Ramadan] and other nights, is from after the Ishaa prayer until the break of dawn. The best part of this time is the last third of the night, due to the hadith about our Lord, the Blessed and Exalted, descending when only the last third of the night remains.