Chasidut zu Wajikra 26:4

Leviticus 26,4. “then I will provide you with your rain ‎at the appropriate time.” Seeing that we have referred to ‎the reward for performance of the commandments as being ‎reserved for the world to come, this verse poses the question that ‎it appears to contradict the statement of our sages that there is ‎no reward for mitzvah performance to be expected in this ‎life on earth. (Kiddushin 39)
We may answer this ‎apparent contradiction by reminding the reader of Avot 4,2 ‎in which we are told that the reward for performing a ‎‎mitzvah is the opportunity to perform additional ‎‎mitzvoth. Receiving the rain we need on time results in our ‎economic viability and our ability to perform additional ‎commandments such as being charitable to the poor with our ‎disposable income. All this comes under the heading of ‎‎“performance of a commandment dragging in its wake the ‎opportunity to perform additional commandments.” This does ‎not contradict what the sages meant when they described the ‎‎“real” reward for performing the commandments being saved for ‎life beyond the death of our bodies.‎