All of these stocks can provide steady income to retired investors.Many retirees are investors for a good reason: They can't rely entirely on Social Security to fund their retirement. Investing wisely provides a means to retire comfortably.Three Motley Fool contributors think they have found stocks to buy that retirees should absolutely love. All three offer juicy dividend yields. Here are their cases for AbbVie (ABBV -0.25%), Bristol Myers Squibb (BMY -0.28%), and Gilead Sciences (GILD -2.55%). Everything ...