Vomiting does not invalidate wudoo’

Some scholars are of the
view that vomiting does not invalidate wudoo’, such as Imam Abu Haneefah and
Imam Ahmad. But Ahmad stipulated that vomiting does invalidate wudoo’ if
there is a large amount of vomit. 

Imam al-Shaafa’i was of
the view that vomiting does not invalidate wudoo, and this is the correct
view, because there is no sound evidence to show that vomiting invalidates
wudoo’. 

See: al-Majmoo’, 2/63-65; al-Mughni, 1/247-250 

Shaykh Ibn ‘Uthaymeen (may Allaah have mercy on him) was
asked: Does whatever comes out of anything other than the front and back
passages invalidate wudoo’? 

He replied: 

What comes out of anything other than the front and back
passages does not invalidate wudoo’, whether it is a little or a lot, except
urine and stools. That is because the basic principle is that it does not
invalidate wudoo’. Whoever claims something that is contrary to the basic
principle has to provide evidence, but it is proven that man is taahir by
the shar’i evidence, and whatever is proven by the shar’i evidence cannot be
altered except by further shar’i evidence. We do not go beyond what is
indicated by the Book of Allaah and the Sunnah of His Messenger (peace
and blessings of Allaah be upon him), because we submit to the laws of
Allaah, not to our whims and desires. So there is no justification for
making people purify themselves when it is not essential and we do not waive
from them a purification that is obligatory.

If someone were to say
that it is narrated that the Prophet (peace and blessings of Allaah be
upon him) vomited then did wudoo’, we say: this hadeeth has been classed as
da’eef by most of the scholars. Then we say that this is simply an action,
and the fact that the Prophet (peace and blessings of Allaah be upon
him) simply did an action does not indicate that it is obligatory, because
there is no clear instruction. Moreover it is contradicted by another
hadeeth – even if it is da’eef – which says that the Prophet (peace and
blessings of Allaah be upon him) was treated with cupping then he prayed and
did not do wudoo’. This indicates that it is not obligatory to do wudoo’
after vomiting. 

This is the correct view,
that whatever comes out from the body does not invalidate wudoo’ even if it
is a lot, whether it is vomit, saliva, blood, pus or anything else, unless
it is urine or stools, such as if an opening is made in the body to let them
out, in which case wudoo’ is invalidated when they come out from that
opening. End quote. 

Majmoo’ Fataawa Ibn ‘Uthaymeen,
11/198.