It is narrated from Sayyiduna Samurah bin Jundub (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "These requests are a wound with which one of you wounds his face, except that a man asks someone in authority, or in a matter without which he has no alternative."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6738