Mishnah Shevuot 2

ידיעות הטומאה שתים שהן ארבע. נטמא וידע. ונעלמה ממנו הטומאה. וזכור את הקדש. נעלם ממנו הקדש. וזכור את הטומאה. נעלמו ממנו זה וזה. ואכל את הקדש ולא ידע. ומשאכל ידע. הרי זה בעולה ויורד. נטמא וידע. ונעלמה ממנו טומאה. וזכור את המקדש. נעלם ממנו מקדש. וזכור את הטומאה. נעלם ממנו זה וזה. ונכנס למקדש ולא ידע. ומשיצא ידע. הרי זה בעולה ויורד:

The laws concerning the discovery of having contracted uncleanness are of two kinds, subdivided into four;[If] he became impure and was aware of it, then he forgot that he had been impure, though he remembered that the food was holy; [If the fact that it was] holy food was unknown to him, though he remembered that he was impure; [If] both were unknown to him; And he ate holy food, and was not aware, and after he had eaten, he became aware: in these cases he brings a sliding scale sacrifice. [[If] he became impure and was aware of it, then he forgot that he had been impure, though he remembered that [he was entering] the Temple; [If the fact that he was entering] the Temple was unknown to him, though he remembered that he was impure; [If] both were hidden from him; And he entered the Temple and was not aware, and after he had gone out, became aware: in these cases he brings a sliding scale sacrifice.

אחד הנכנס לעזרה. ואחד הנכנס לתוספת העזרה. שאין מוסיפין על העיר ועל העזרות. אלא במלך ונביא ואורים ותומים ובסנהדרין של שבעים ואחד. ובשתי תודות. ובשיר. ובית דין מהלכין ושתי תודות אחריהם. וכל ישראל אחריהם. הפנימית נאכלת. והחיצונה נשרפת. וכל שלא נעשה בכל אלו. הנכנס לשם. אין חייבין עליה:

It is the same whether one [while impure] enters the Temple court or the addition to the Temple court, for additions are not made to the city [of Jerusalem], or to the Temple courts except by the king, prophet, Urim and Thummim, the Sanhedrin of seventy one, and with two [loaves] of thanksgiving, and with song. And the court walks in a procession, the two [loaves] of thanksgiving [being carried] after them, and all Israel [following] behind them. The inner one is eaten, and the outer one is burnt. And as to any addition that was made without all these he who enters it [while impure] is not liable.

נטמא בעזרה ונעלמה ממנו טומאה. וזכור את המקדש. נעלם ממנו מקדש וזכור לטומאה. נעלם ממנו זה וזה. והשתחוה. או ששהה בכדי השתחואה. בא לו בארוכה חייב. בקצרה פטור. זו היא מצות עשה שבמקדש שאין חייבין עליה:

If he became impure while in the Temple court [and was aware of it], and then forgot that he was impure, though he remembered that he was in the Temple; [Or] he forgot that he was in the Temple, though he remembered that he was impure; [Or,] he forgot both; And he prostrated himself, or waited [in the Temple] the time it takes to prostrate; Or went out the long way, he is liable; [If he went out] the shorter way, he is not liable; This is the positive precept concerning the temple for which they [the court] are not liable.

ואיזו היא מצות עשה שבנדה שחייבין עליה. היה משמש עם הטהורה. ואמרה לו נטמאתי. ופירש מיד חייב. מפני שיציאתו הנאה לו כביאתו:

And which is the positive precept concerning a menstruant for which they are liable? [This:] if one cohabited with a [ritually] pure woman, and she said to him: “I have become impure”, and he withdrew immediately, he is liable, because his withdrawal is as pleasant to him as his entry.

רבי אליעזר אומר (ויקרא ה, ב) השרץ. ונעלם ממנו. על העלם שרץ חייב. ואינו חייב על העלם מקדש. רבי עקיבא אומר ונעלם ממנו והוא טמא. על העלם טומאה חייב. ואינו חייב על העלם מקדש. ר' ישמעאל אומר ונעלם ונעלם שתי פעמים. לחייב על העלם טומאה ועל העלם מקדש:

Rabbi Eliezer said: “[Scripture says: ‘If any one touch… the carcass of] an impure creeping thing, and it be unknown to him’ (Leviticus 5:2), when the impure creeping thing is unknown to him, he is liable; but he is not liable, when the [fact that he is in the] Temple is unknown to him.” Rabbi Akiba said: “[Scripture says:] ‘and it be hidden from him that he is impure’: when his impurity is unknown to him, he is liable; but he is not liable, when the [fact that he is in the] Temple is unknown to him.” Rabbi Ishmael said: “[Scripture] twice [says:] ‘and it be hidden from him’, in order to make him liable both for the forgetfulness of the impurity and the forgetfulness of the Temple.”