Washing the hand when relieving oneself, and the meaning of "hand" in the hadith

The questioner:
And it is established that he used his hand in the space of his need once from the merchandise. Note. And his son is independent in relieving himself before he washes it.

The Shaykh:
Nothing has been reported regarding this; rather, it was reported for the one who wants to dip his hand in the vessel. As for if he wants to relieve himself with his other hand for one of his needs, such as taking something, eating something, writing something, or working with his hand, the command does not include him. And if he washes it for the sake of cleanliness, this is not prohibited. But it does not fall under the meaning of the hadith. Yes. Hmm? Yes, indeed. The meaning of "hand" is both hands, yes, the meaning of "hand" is both hands, yes. But the common practice is that he scoops with his right hand, so the hand he intends to insert he washes, whether it is one hand or both hands.