It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When the last third of the night remains, Allah, in a manner befitting His Majesty, descends to the lowest heaven. The gates of the heavens are opened, and Allah spreads out His hands and says: 'Is there anyone who asks so that his request may be granted?' And this continues until the break of dawn."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 4268
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد حسن فى الشواهد، إبراهيم الهجري لين الحديث.