It is narrated from Sayyiduna Jubayr bin Mut'im (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Allah, the Mighty and Majestic, descends every night to the lowest heaven and says: Is there anyone asking, that I may give him? Is there anyone seeking forgiveness, that I may forgive him?"
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1553