COMMENTARY on 12:57
A. Yusuf Ali:

Translation:
But verily the reward of the Hereafter is the best, for those who believe, and are constant in righteousness. 1718
Commentary:

1718  To die righteous, whatever rewards (if any) (hat come in this world are welcome for the opportunities of service which they open out. But the true and best reward is in the Hereafter.

 

Muhammad Asad:

Translation:
But in the eyes of those who have attained to faith and have always been conscious of Us, a reward in the life to come is a far greater good [than any reward in this world]. 57
Commentary:
57  Lit., "for those who have attained to faith...", etc.