If they disbelieve you, messengers before you have been disbelieved. God is in control of all things.
وَإِن يُكَذِّبوكَ فَقَد كُذِّبَت رُسُلٌ مِن قَبلِكَ وَإِلَى اللَّهِ تُرجَعُ الأُمورُ
wa iny yukazzibooka faqad kuzzibat Rusulum min qablik; wa ilal laahi turja’ul umoor