user17113: I read some articles about Satoshi's history and stumbled upon this one:

No one knows what Satoshi is up to, but one of the last emails he sent to a software developer, dated April 23 2011, said “I’ve moved on to other things. It’s in good hands with Gavin and everyone.”

Source: http://www.coindesk.com/information/who-is-satoshi-nakamoto/
This sentence of Satoshi is quoted many times in the web, but I can't find a source who published it or to which developer it was send. I know there are archives of Satoshi's mails but I didn't find this statement in any of them.
Does anybody have further information about it?

user81198: Ultimate necro, but it was Mike Hearn. You can find multiple emails between Satoshi Nakamoto and himself from back then at his site here: http://plan99.net/%7Emike/
The specific quote you've found is the last email in the last thread (http://plan99.net/%7Emike/satoshi-emails/thread5.html).

user17113: I've got an answer on Reddit:
It's likely to have been written in a PM or an email to some developers, and it seems that Mike Hearn (BitcoinJ) was the one who published this statement:

Mike Hearn - February 25, 2013, 12:48:54 PM
He communicated with a few of the core developers before leaving. He
  told myself and Gavin that he had moved on to other things and that
  the project was in good hands.

Source: Re: Could Satoshi come back and tell us what he/her thinks about the block size?
Still, if someone has additional information I would be glad to know about.

17113: <p>I read some articles about Satoshi's history and stumbled upon this one:</p>

<blockquote>
  <p>No one knows what Satoshi is up to, but one of the last emails he sent to a software developer, dated April 23 2011, said “I’ve moved on to other things. It’s in good hands with Gavin and everyone.”</p>
</blockquote>

<p>Source: <a href="http://www.coindesk.com/information/who-is-satoshi-nakamoto/" rel="noreferrer">http://www.coindesk.com/information/who-is-satoshi-nakamoto/</a></p>

<p>This sentence of Satoshi is quoted many times in the web, but I can't find a source who published it or to which developer it was send. I know there are archives of Satoshi's mails but I didn't find this statement in any of them.</p>

<p>Does anybody have further information about it?</p>
 81198: <p>Ultimate necro, but it was Mike Hearn. You can find multiple emails between Satoshi Nakamoto and himself from back then at his site here: <a href="http://plan99.net/%7Emike/" rel="noreferrer">http://plan99.net/%7Emike/</a></p>

<p>The specific quote you've found is the last email in the last thread (<a href="http://plan99.net/%7Emike/satoshi-emails/thread5.html" rel="noreferrer">http://plan99.net/%7Emike/satoshi-emails/thread5.html</a>).</p>
 17113: <p>I've got <a href="http://www.reddit.com/r/Bitcoin/comments/29bamh/source_of_satoshis_final_statement/cij9m83" rel="noreferrer">an answer on Reddit</a>:</p>

<p>It's likely to have been written in a <a href="https://en.wikipedia.org/wiki/Personal_message" rel="noreferrer">PM</a> or an email to some developers, and it seems that Mike Hearn (BitcoinJ) was the one who published this statement:</p>

<blockquote>
  <p>Mike Hearn - February 25, 2013, 12:48:54 PM</p>
  
  <p>He communicated with a few of the core developers before leaving. He
  told myself and Gavin that he had moved on to other things and that
  the project was in good hands.</p>
</blockquote>

<p>Source: <em><a href="https://bitcointalk.org/index.php?topic=145850.msg1558053#msg1558053" rel="noreferrer">Re: Could Satoshi come back and tell us what he/her thinks about the block size?</a></em></p>

<p>Still, if someone has additional information I would be glad to know about.</p>
