Dua, - Performing Wudu

Being in a state of Wudu is important to a Muslim, one requires it
when performing Salaah, the Prophet [May the Peace and Blessings of
Allah be upon him] used to love being in a state of wudu and some
Of the etiquettes of dua is that a person be in a state of Wudu
(Ritual purity) while making dua. This is confirmed in the Hadith of
Abu Musa al-Ash'ari in which he stated that the Prophet [May the Peace
and Blessings of Allah be upon him] after the Battle of Hunayn, called
for water, performed wudu, then raised his hands and said: "O Allah!
Forgive 'Ubayd ibn Amir!" Abu musa said, "I could see the whiteness of
his armpits" [al-Bukhari #4323 and Muslim #2498]