The evidence for this is the Prophet’s statement, peace and blessings be upon him, to the women who were washing his daughter: “Begin with her right side and with the parts of her body washed in ablution.” (1)
This is not obligatory, as shown by the Prophet’s instruction concerning the man whose camel threw him down at Arafah and who died: “Wash him with water and lote leaves.” (2) He did not say, “Perform ablution for him.” This shows that ablution is not obligatory, but recommended.
If someone were to say: Does not the Prophet’s statement, peace and blessings be upon him, “Begin with her right side and with the parts of her body washed in ablution,” indicate that ablution is recommended, since he mentioned it together with beginning with the right side, which is recommended? We say: This cannot serve as proof, for this is a case of inference through conjunction, and such an inference is weak. Rather, the sound evidence for its being recommended is the hadith of the man whose camel threw him down, and we have already explained how it proves this.
“He does not put water into his mouth or nose. He inserts his two fingers, moistened with water, between his lips and wipes his teeth; and he inserts them into his nostrils and cleans them, but does not put water into them. Then he forms the intention to wash him and says Bismillah, …”
His statement, “He does not put water into his mouth or nose,” means that he does not put water into his mouth in place of rinsing the mouth, nor into his nose in place of inhaling water into the nose. This is because, when a living person puts water into his mouth, he rinses it around and spits it out. But if we were to pour water into the deceased’s mouth, it would run down into his stomach and might cause something dormant to move. The same applies to inhaling water into the nose: the deceased cannot inhale water into his nose, nor can he expel it. Therefore, we say: Do not put water into his mouth or his nose.
His statement, “He inserts his two fingers, moistened with water, between his lips and wipes”