Read and reflect on verse 723 from Surah Al-Maaida: O you who have attained to faith! If you ever abandon your faith," God will in time bring forth [in your stead] people whom He loves and who love Him ...
يَا أَيُّهَا الَّذِينَ آمَنُوا مَنْ يَرْتَدَّ مِنْكُمْ عَنْ دِينِهِ فَسَوْفَ يَأْتِي اللَّهُ بِقَوْمٍ يُحِبُّهُمْ وَيُحِبُّونَهُ أَذِلَّةٍ عَلَى الْمُؤْمِنِينَ أَعِزَّةٍ عَلَى الْكَافِرِينَ يُجَاهِدُونَ فِي سَبِيلِ اللَّهِ وَلَا يَخَافُونَ لَوْمَةَ لَائِمٍ ۚ ذَٰلِكَ فَضْلُ اللَّهِ يُؤْتِيهِ مَنْ يَشَاءُ ۚ وَاللَّهُ وَاسِعٌ عَلِيمٌ
O you who have attained to faith! If you ever abandon your faith," God will in time bring forth [in your stead] people whom He loves and who love Him - humble towards the believers, proud towards all who deny the truth: [people] who strive hard in God's cause, and do not fear to be censured by anyone who might censure them: such is God's favour, which He grants unto whom He wills. And God is infinite, all-knowing.