Sunan Ibn Majah Book 34, Hadith 39
Prophet (saas) said: "Your Lord is Kind and Most Generous, and is too kind to let His slave, if he raises his hands to Him, bring them back empty," or he said "frustrated."
'Abdullah bin Mughaffal heard his son say: "O Allah, I ask You for the white palace on the right-hand side of Paradise, when I enter it." He said: "O my son, ask Allah for Paradise and seek refuge with Him from Hell, for I heard the Messenger of Allah (saas) say: 'There will be people who will transgress in supplication.'"
the Messenger of Allah (saas) said: "When you supplicate to Allah, supplicate with your palms uppermost, not with the backs of your hands uppermost, and when you finish, wipe your face with them."