I heard it from TRUMP very early on, when he came on the scene assuring of us consequences for the invaders. I do follow his rallies and personal interviews, but I do not take notes.
You might check out his policy papers for details, on his website.
Can policy papers be trusted more or less than his interviews? Below is a link from July of a transcript of Trump and Hannity talking about it where he says he wants to expedite things so they can come back in. There are other interviews where he’s said it and where his son’s said it. There is also at least one interviews where he said he’d do something for DREAMers who are with their parents in the US.
http://www.foxnews.com/transcript/2015/07/28/donald-trump-on-why-his-message-resonates-with-voters/