Tosefta for Pesachim 71:1
האוכל נבלה ביום הכפורים פטור
He who eats nebelah on the Day of Atonement is not liable [to a sin-offering].<span class="x" onmousemove="('comment',' Which eating on the Day of Atonement usually incurs, the reference being to eating in ignorance. The reason is that since it is forbidden on the score of nebelah, the interdict of the Day of Atonement cannot take effect. Thus the same applies here.');"><sup>1</sup></span> Rabina said, You may even say [that it agrees with] the Rabbis: [the meaning is] that the interdict which is on account of thou shalt not eat leavened bread with it' alone, thus this is excluded, for its interdict is not on account of 'thou shalt not eat leavened bread with it' alone, but also on account of 'thou shalt not eat tebel'.