"And O my people! Ask forgiveness of your Lord and then repent to Him, He will send you (from the sky) abundant rain, and add strength to your strength, so do not turn away as criminals.''
Then he commanded them to seek the forgiveness of the One Who is capable of expiating previous sins. He also commanded them to repent for that which they may do in the future. Whoever has these characteristics, Allah will make his sustenance easy for him, grant him ease in his affairs and guard over his situation.
For this reason Allah says,
يرسل السماء عليكم مدرارا
He will send you (from the sky) abundant rain,