Concise Quran Commentary
Within a time period not before three years and not after ten. To Allah belongs the command, prior to the Roman’s victory and after it. And on the day the Romans defeat the Persians, the believers will be happy.
فِى بِضْعِ سِنِينَ ۗ لِلَّهِ ٱلْأَمْرُ مِن قَبْلُ وَمِنۢ بَعْدُ ۚ وَيَوْمَئِذٍ يَفْرَحُ ٱلْمُؤْمِنُونَ
within a few years. To Allah belongs the whole matter before and after [the victory]. On that day the believers will rejoice