And he passed by Sa'd while he was performing ablution and said to him: “Do not waste water.” Sa'd asked: “Can using water be wasteful?” He replied: “Yes, even if you are beside a flowing river (1)” (2).

It is authentically reported that he performed ablution washing each part once, twice, or three times; he also washed some parts twice and others three times.

He would rinse his mouth and draw water into his nose, sometimes using one handful of water, sometimes two, and sometimes three. He would combine rinsing the mouth and drawing water into the nose, using half the handful for his mouth and half for his nose. With a single handful, this is the only possible way; with two or three handfuls, the two actions can be either separated or combined. His practice (may Allah bless him and grant him peace), however, was to combine them, as reported in the two Sahīh collections (3), in the hadith of 'Abd Allāh ibn Zayd: the Messenger of Allah (may Allah bless him and grant him peace) rinsed his mouth and drew water into his nose from a single handful,