Source text
وَإِنْ تَجَاوَزَ وَكَانَ قَدْرَ الدِّرْهَمِ وَجَبَ إِزَالَتُهُ بِالْمَاءِ، وَإِنْ زَادَ عَلَى الدِّرْهَمِ افْتُرِضَ غَسْلُهُ
• The measurement concerns the portion that has spread beyond the outlet.
• If that spread is the size of a dirham, washing it is obligatory (Wajib).
• If it exceeds the dirham amount, washing it is obligatory at the level of Fard.
• In these cases, merely wiping the spread impurity does not replace the required washing.