Yusuf • BN-TAFSEER-IBN-E-KASEER
﴿ وَجَآءَ إِخْوَةُ يُوسُفَ فَدَخَلُوا۟ عَلَيْهِ فَعَرَفَهُمْ وَهُمْ لَهُۥ مُنكِرُونَ ﴾
“AND [after some years,] Joseph's brothers came [to Egypt] and presented themselves before him: and he knew them [at once], whereas they did not recognize him.”
Please check ayah 12:62 for complete tafsir.