Psalm 37:3

"Trust in the LORD, and do good; dwell in the land and befriend faithfulness."

That is, as opposed to worrying about evildoers and envying wrongdoers, for their reward is coming. We should not follow them, but rather trust that following God is the right way.

"...and befriend faithfulness."

This, according to my Bible, can also be translated, "and feed on faithfulness," or, "and find safe pasture." All three translations seem to give "dwell in the land" a sense of security, especially in the context of the passage so far. To me, it seems like all three translations of the last phrase not only suit the verse well, but complement one another. Since the LORD alone is our shepherd, we can dwell in the land safely, sustained by His faithfulness.

Peace.