It is narrated from Sayyiduna Salman al-Farisi (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Allah, the Mighty and Majestic, is shy before His servant, that he should raise his hands to Him and He send them back empty."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6105