Have you got a link to that? I'd be interested to know if that is what he actually said and if so, in what context.
All I can find online so far is this:
http://www.bbc.co.uk/news/uk-wales-politics-39424361
"The current First Minister Carwyn Jones, who was on the Remain side last year, said he stood "ready to work constructively with the UK government to secure a deal which protects Welsh businesses, our economy and the future prosperity of Wales".
"If, as negotiations progress, we believe our priorities are not being championed or our representation falls below a level we find acceptable, we will not remain silent," he said.
Mr Jones added: "As a leader of a country which voted to leave the EU, we are wholly focused on securing Wales' future."