Sayyidah Umm Salamah (may Allah be pleased with her) narrates: The Prophet (peace and blessings be upon him) said: When it is a boy who does not yet eat food, water is poured over his urine, and if it is a girl, it (her urine) is washed. (Allamah al-Haythami says:) I say:
Imam Abu Dawud recorded this narration as "mawquf" (stopping at a Companion) on Sayyidah Umm Salamah (may Allah be pleased with her).
Imam al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains a narrator, Isma'il bin Muslim al-Makki, and he is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الطهارة / 1575