It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "Wudu (washing the hands) before food and after it is among the things that remove poverty, and it is one of the practices of the Messengers."
This hadith is not narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) except with this chain, and Ahmad bin Abd al-Rahman bin al-Mufaddal (may Allah have mercy on him) is alone in narrating it.
Hadith Referenceالمعجم الأوسط / باب الميم / 7166
Hadith Gradingمحدثین:إسناده ضعيف جدًّا، فيه نهشل بن سعيد متروك
Hadith Takhrij«قال الهيثمي: وفيه نهشل بن سعيد وهو متروك «مجمع الزوائد ومنبع الفوائد، ج 5، ص 24»»