This was said by the Buddha, the Perfected One: that is what I heard.

“This one thing, mendicants, when developed and cultivated, secures equal benefits for both this life and lives to come. What one thing? Diligence in skillful qualities. This is the one thing that, when developed and cultivated, secures equal benefits for both this life and lives to come.”

The Buddha spoke this matter. On this it is said:

“The astute praise diligence 
in making merit. 
Being diligent, an astute person 
secures both benefits:

the benefit in this life, 
and in lives to come. 
Attentive, comprehending the meaning, 
they are said to be astute.”

This too is a matter that was spoken by the Blessed One: that is what I heard.