What are the three dividend stocks to buy and hold forever?

I'm curious to know, what are the three dividend stocks that investors should consider buying and holding onto indefinitely? Are these stocks from established blue-chip companies with consistent dividend growth? Or perhaps, are they stocks that offer a high dividend yield but may have a bit more volatility? Could you elaborate on the key factors to consider when selecting these stocks, such as dividend growth potential, company stability, and sector outlook? Additionally, are there any risks associated with holding dividend stocks indefinitely, and how can investors mitigate those risks? I'd appreciate a detailed response that outlines the rationale behind these recommended stocks.