I say, and with God's success: If a person's hand is cut off from the elbow, they must wash the area of the cut; because the elbows are included in the washing; as His Exalted says: {And your hands up to the elbows} Al-Ma'idah 6. Refer to: Al-Bada'i 1: 4, Sharh Al-Wiqayah 1: 74, Al-Binayah 1: 109, Umdat Al-Ri'ayah 1: 55, and Tuhfat Al-Fuqaha, 1/9, and Al-Ikhtiyar, 1/11, and Mukhtalif Al-Riwayah, pp. 280-282, and God knows best.