وَفَرْضُ الْمَسْحِ قَدْرُ ثَلَاثِ أَصَابِعَ مِنْ أَصْغَرِ أَصَابِعِ الْيَدِ عَلَى ظَاهِرِ مُقَدَّمِ كُلِّ رِجْلٍ، وَسُنَنُهُ مَدُّ الْأَصَابِعِ مُفَرَّجَةً مِنْ رُؤُوسِ أَصَابِعِ الْقَدَمِ إِلَى السَّاقِ
• The Fard minimum is the area of three small hand-fingers on the upper front of each khuff, wiped once.
• The Sunnah method is to spread the wet fingers and draw them from the toes toward the shin.
• Wiping only the sole, heel, side, or leg-shaft does not satisfy the Fard because it misses the legal area.
• If the required upper-front area is wetted in another direction, such as widthwise, the wipe can be valid but the Sunnah method has been left.