May he endure^[a] as long as the sun,
    as long as the moon, through all generations.
⁶ May he be like rain falling on a mown field,
    like showers watering the earth. 
⁷ In his days may the righteous flourish
    and prosperity abound till the moon is no more. Psalm 72: 5-7

Is there a connection between righteousness? What is that connection?