﴿ وَأُخْرَىٰ لَمْ تَقْدِرُوا۟ عَلَيْهَا قَدْ أَحَاطَ ٱللَّهُ بِهَا ۚ وَكَانَ ٱللَّهُ عَلَىٰ كُلِّ شَىْءٍۢ قَدِيرًۭا ﴾

“And there are yet other [gains] which are still beyond your grasp, [but] which God has already encompassed [for you]: for God has the power to will anything.”

وَعَدَكُمُ اللَّـهُ مَغَانِمَ كَثِيرَ‌ةً تَأْخُذُونَهَا فَعَجَّلَ لَكُمْ هَـٰ وَأُخْرَ‌ىٰ لَمْ تَقْدِرُ‌وا عَلَيْهَا قَدْ أَحَاطَ اللَّـهُ بِهَا (And (there are) other (victories) that have not come within your power as yet, (but) Allah has encompassed them...." (48:21). This verse embodies a prophecy that Muslims will achieve many more great victories after the victory of Khaibar. But Allah says that they were unable to achieve them at that time; they would happen in future. Among these victories, Makkah was the first one to be achieved. Therefore, some scholars refer this to the victory of Makkah. However, the wordings are general and refer to all the victories that will be achieved till the end of the world (Mazhari).