Related for Pesachim 71:4
ת"ר יכול יוצא אדם ידי חובתו במעשר שני בירושלים ת"ל (דברים טז, ג) לחם עוני מה שנאכל באנינות יצא זה שאינו נאכל באנינות אלא בשמחה דברי ר' יוסי הגלילי
teaching, [it must be] that which may be eaten in grief [aninuth].<span class="x" onmousemove="('comment',' Connecting 'oni () with anah () to mourn or grieve, though the former is spelled with an , while the latter is with an ,these letters often being interchangeable in Semitic languages. - Aninuth denotes the state of grief between the death of a near relative, e.g., one's father, and his burial, the bereaved person then being called an onen.');"><sup>4</sup></span> thus this is excluded, which is not eaten in grief but [only] in joy:<span class="x" onmousemove="('comment',' An onen (v. preceding note) may not eat second tithe, cf. Deut. XXVI, 14:]I have not eaten thereof (sc. second tithe) in my mourning');"><sup>5</sup></span>