It is narrated from Sayyiduna Abu Ubayd (may Allah be pleased with him), who was the freed slave of Rifa'ah bin Rafi' (may Allah be pleased with him), that the Messenger of Allah (peace and blessings be upon him) said: "Cursed is the one who asks by the Face of Allah, and cursed is the one who is asked by the Face of Allah and denies the one asking him."
Hadith Referenceالمعجم الكبير للطبراني / مسند من يعرف بالكنى / 19146