Halakhah su Deuteronomio 18:5

That He prohibited us from leaving one hung on a tree overnight; so that the 'blessing' of God not spread as a result of this, due to one's reflection when he sees it - since we only hang a blasphemer and an idol worshipper. [For about the latter too] does it [state] - "he blasphemes the Lord" (Deuteronomy 18:5). And the prohibition of this negative commandment is, "You must not let his corpse remain overnight on the tree" (Deuteronomy 21:23). And the language of the Sifrei (Sifrei Devarim 221:7) is, "'You must not let his corpse remain overnight' - that is a negative commandment." And the regulations of this commandment have already been explained in the sixth [chapter] of Sanhedrin. (See Parashat Ki Tetzei; Mishneh Torah, The Sanhedrin and the Penalties within their Jurisdiction 15.)

That He prohibited us from being lethargic in guarding the Temple and constantly walking around it the whole night. And that is His, may He be exalted, saying, "And you shall keep the charge of the sanctuary" (Numbers 18:5). And it has already been explained in Commandment 22 of the Positive Commandments that guarding the Temple and walking around it is a positive commandment; and we are now likewise explaining that its negation is a negative commandment. And the language of the Mekhilta is, "'And they shall keep the charge of the Tent of Meeting' (Deuteronomy 18:4) - I only have a positive commandment. From where [do we know] that it is [also] a negative commandment? [Hence] we learn to say, 'And you shall keep the charge of the sanctuary.'" And the regulations of this law have already been explained at the beginning of Tamid and Middot. (See Parashat Korach; Mishneh Torah, The Chosen Temple 8.)

And so [too,] that which they, may their memory be blessed, said (Zevachim 21b), [about] how much water needs to be in the basin - [that it is] no less than water that is fit for the [washing] of four people - as it is is stated, "And let Aharon and his sons wash their hands and their feet." And they were Aharon and Elazar and Itamar, and Pinchas was with them. And that all water is fit for sanctification - whether the water from a spring or the water of a pool (mikveh) - and they are disqualified by [passing the night]. And how is the commandment of the sanctification (Zevachim 19b) - that he places his right hand on his right foot and his left hand on his left foot and washes standing up and not sitting. As the sanctification of the hands and feet is included in the service, and all of the services of the Temple are [done while] standing up - as it is stated (Deuteronomy 18:5), "to stand and to serve." And all of this is for the loftiness of the [Temple]. And the rest of its details are elucidated in the second chapter of Zevachim.