Go back and perform ablution well
Jabir (may Allah be pleased with him) reported:
'Umar ibn Al-Khattab said that a person performed ablution and left a small part equal to the space of a nail (unwashed). The Apostle of Allah (May the peace and blessings of Allah be upon him) saw that and said: Go back and perform ablution well. He then went back (performed ablution well) and offered the prayer.
The jurists defined wudoo 'as: the purification with water for specific body parts with the intention of worshipping Allah.
They call it: the minor purity. They call ghusl from janaabah, menstruation and postpartum bleeding the major purity. The wudoo ' has obligatory and recommended acts, as well as the conditions and etiquettes mentioned by the jurists in their books.
In order for your wudoo 'to be complete, you have to observe these etiquettes, for you will be rewarded for that and your faith will increase.
It is not permissible to leave any spot in a part of your body during wudoo ' without letting water touch it.
But we should know that in order to attain the virtue of wudoo ' which is meant in the hadeeth, we shall perform Wudoo` correctly as Allah explained.
If you want to increase your faith, to strengthen your certainty, to purify your heart, and to reach the status of reverence in prayer, be keen on three things from the first part of your body you wash to the last part.
It is to remember the grace of your Lord on you in each part you wash so that you thank him, to remember the sins it committed so that you seek forgiveness for it, and to be determined to protect it from what it committed accordingly you will finish Wudoo` remembering your Lord, thankful to him, seeking his forgiveness and repenting from the sins.
When you use the water, remember the grace of Allah who gave it to you, enabled you to use it, and thank him for all of that with your heart and tongue.
When you wash your hands, remember the grace of Allah and thank him for that, remember the sins they committed, ask forgiveness for that, and repent sincerely perhaps Allah will accept it from you.
when you rinse the water in your mouth, remember Allah's blessings on you concerning this mouth and what is in it, thank him for that, ask forgiveness from Allah for the sins of your tongue, and repent sincerely.
Continue to do this when you wash your face and hands, wipe over your head and when you wash your feet. It is the Wudoo 'in its proper sense, when you realize that the purification is half of the faith.