And O my people, ask forgiveness of your Lord and then repent to Him. He will send [rain from] the sky upon you in showers and increase you in strength [added] to your strength. And do not turn away, [being] criminals."
Hūd told his people to ask for forgiveness from Allah, and to repent to Him, away from their sins, the biggest of which was associating others with Him. He would reward them by sending abundant rain, and would add strength to their strength by increasing their descendants and wealth. He told them not to turn away from what he was calling them to, because they would then be wrongdoers due to their disbelief in Allah and rejection of what he brought to them.