Tosefta do Wyjścia 30:20

Kohanim that did not sanctify their hands and feet [by washing], and so too a High Priest who did not immerse and did not sanctify his hands and feet between one service and another service, or between [changing from] one set of garments to another set of garments, and [then] performed a service -- their service is valid, but Kohanim who did not immerse and did not sanctify their hands and feet, so too a High Priest who did not immerse and did not sanctify his hands and feet from the basin [of the Temple], and performed a service -- their service is invalid. Either a High Priest or an ordinary Kohen that performed a morning service and did not wash their hands and their feet are liable for the death penalty, as it is said (Ex. 30:43, JPS Tr.), "[The linen breeches shall be worn by Aaron and his sons] when they enter the Tent of Meeting [so that they do not incur punishment and die]." [Even if] he was standing and sacrificing the whole night (i.e., without an opportunity for a nocturnal emission), he is required to sanctify his hands and feet. Rebbi says, staying overnight [even without sleeping] disqualifies the [prior] sanctification of his hands and feet. Rabbi Elazar bar Rabbi Shimon says, even one who is occupied in [Temple] service all seven days of the week, staying overnight does not disqualify the [prior] sanctification of his hands and feet.

Eight [sprinklings] out of seven (Par. 4:2): If he is the Kohen that performed the service with it, it is disqualified, and if it is another Kohen, it is valid. If the burning [is performed by] an onen or one who lacks atonement^*an "onen" is a mourner whose close relative has not yet been buried, while "one who lacks atonement" is one who has not yet brought the sacrifice required to complete his purification; in both cases, the individual is in a state of impurity, Rabbi Yosei the Babylonian says, the one who lacks atonement [renders the burning] disqualified. If the burning [is performed by] one who has not washed his hands and feet, it is disqualified, and Rabbi Elazar ben Rabbi Shimon deems it valid, as it is said (Ex. 30:20), "When they come to the Tent of Meeting, they shall wash with water and they will not die." Thus, one need not sanctify one's hands and feet except when appearing [in the Temple].