فَذَلِكَ -إِنْ شَاءَ اللَّهُ- يَهْجُمُ بِمَا أُوتِيَ مِنْ ذَلِكَ عَلَى الْفَائِدَةِ فِي الِاسْتِكْثَارِ مِنْ جَمْعِهِ،
A specialist, Allah willing, can reach the benefit of assembling a larger body through the expertise already acquired.
“Yahjumu ... ʿalā al-fāʾidah” means to arrive at the benefit. Multiplicity is not itself proof; it becomes useful through an informed comparison of the routes.
Suppose one of three routes contains an extra phrase. A specialist examines that transmitter’s precision, the agreement of other pupils, and the nature of the addition. Neither the number three nor the mere existence of a variant settles its status.