These companies have the financial strength to pay you passive income for life.It can be comforting to hold stocks of strong companies that regularly pay passive income to shareholders. By selecting the right dividend stocks, an investor can easily put together a portfolio that yields around 3% every year in dividend income. If the companies you select grow their earnings, they'll also boost the dividend payment and the yield on your original investment.To get you started, three Motley Fool contributors wer ...