Liturgy for Yoma 175:2

בעל קרי טובל והולך עד המנחה רבי יוסי אומר כל היום כולו

That is a dispute of Tannaim, for it was taught in a Baraitha: All those obliged to immerse themselves may do so in their usual manner on the Day of Atonement, the menstruating woman, and the woman after childbirth immerse themselves in their usual manner on the evening of the Day of Atonement. One who had a pollution may do so until the afternoon prayer.<span class="x" onmousemove="('comment',' That means, if he had experienced pollution before then, he may immerse himself until Minhah, so that he may pray the afternoon prayer. But if it happened after the afternoon prayer, he should not immerse himself, but await until dark therewith. The Sages hold that the Ne'ilah is to be said at night, and therefore in agreement with Rab's teaching, renders exempt the evening prayer; whereas R. Jose, who holds that the man who had experienced pollution may immerse himself throughout the day, so that even if he had experienced after the afternoon prayer, he may immerse himself in order that he might pray the concluding prayer, is of the opinion that the Ne'ilah prayer is not said at night, and therefore does not exempt the evening service.');">³</span>

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