It would be a “very poor idea” for Apple Inc. to invest in Tesla Inc., Berkshire Hathaway Inc. Chief Executive and legendary investor Warren Buffett told Fox Business on Thursday.

Buffett also issued an indirect, mild rebuke to Tesla Chief Executive Elon Musk during an interview broadcast Thursday, saying in regards to Musk’s “funding secured” tweet that while anyone can misspeak, “if you misspeak, you correct it immediately.”