I say, and with God's success: It is recommended to wash the hands at the beginning of ablution up to the wrists three times - and the wrist is the joint between the forearm and the hand - before and after cleaning oneself, according to the preferred opinion; as narrated by Abu Huraira (may Allah be pleased with him) who said that the Prophet (peace be upon him) said: "When one of you wakes up from his sleep, he should not dip his hand into the container until he washes it three times, for he does not know where his hand has been during the night," in Sahih Muslim 1: 233, and Sahih Ibn Khuzaymah 1: 74, and Sahih Ibn Hibban 3: 345. Refer to: Al-Jawharah Al-Nayyirah, 1/5, Al-Bahr Al-Ra'iq, 1/17, Umdat Al-Ri'ayah 1: 62, and Sharh Al-Wiqayah p. 80, and Allah knows best.