God helps those who help themselves
Trust in God and keep your powder dry
, a similar exhortation from Oliver Cromwell to his troops
Praise the Lord and Pass the Ammunition
, a similar exhortation in World War II
Parable of the drowning man
, modern story often told with this as its moral
Protestant work ethic
– Social-theologic concept
Prosperity theology
– Material wealth-based Christian belief
https://en.wikipedia.org/wiki/God_helps_those_who_help_themselves