Mukhtasar Sahih Bukhari — Hadith 606

Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Our Lord, the Most Great and Most Exalted, descends every night to the lowest heaven when the last third of the night remains, and He says: 'Is there anyone who will supplicate to Me so that I may answer his supplication? Is there anyone who will ask of Me so that I may grant him? Is there anyone who will seek forgiveness from Me so that I may forgive him?'"