If those you invite to Allah turn away do not let it grieve you 31:23-26
31:23 As for those who disbelieve, do not let their disbelief grieve you, to Us they shall return and We will tell to them what they did. Allah has knowledge of what is innermost in their chests.
31:25 If you ask them, 'Who has created the heavens and the earth?' They will reply, 'Allah.' Say, 'Praise belongs to Allah!' But most of them do not have knowledge.