Reference for Zevachim 40:5

ת"ש קידש ידיו ורגליו ונטמאו מטבילן ואין צריך לקדש יצאו הרי הן בקדושתן

If you say that the passing of the night does not invalidate [it], that is because [the priest] did not cease [officiating], but since he ceases when he goes out, he turns his mind away from it;<span class="x" onmousemove="('comment',' Therefore he must repeat his lustrations when he returns.');">³</span>

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