Sahih Bukhari Volume 4, Book 53, Hadith Number 365.
Narrated Jabir: Once I went to Abu Bakr and asked for the money but he did not give me, and I went to him again, but he did not give me, so I went to him for the third time and said, “I asked you, but you did not give me; then I asked you (for the second time) and you did not give me; then I asked you (for the third time) but you did not give me. You should either give me or allow yourself to be considered a miser regarding my case.” Abu Bakr said, “You tell me that I am a miser with regard to you. But really, whenever I rejected your request, I had the inclination to give you.”
(In another narration Jabir added:) So, Abu Bakr scooped up money with both hands for me and asked me to count it. I found out that It was five hundred. Abu Bakr told me to take twice that amount.