Fasting,
Pouring water over one's self and submersing one's self in water
Pouring water over one's self and
submersing one's self in water: Abu Bakr ibn 'Abdurrahman reported
from a number of companions that they had seen Allah's
Messenger pour water over his head while he was fasting due to
thirst or extreme heat. This is related by Ahmad, Malik, and
Abu Dawud with a sahih chain.
In the two Sahih of al-Bukhari and Muslim, it is related from
'Aishah that the Prophet would rise in the morning on a fasting day
and then would perform ghusl (a complete bath). If during the
bath some water is swallowed unintentionally, the fast is still
valid.