Reference for Pesachim 115:6
הלכך בשאר ימות השנה דאיכא נדרים ונדבות דרחמנא אמר (ויקרא ו, ה) עליה חלבי השלמים
Because Scripture saith, 'between the evenings', [meaning] from the time that the sun commences to decline in the west. Therefore on other days of the year, when there are vows and freewill-offerings,<span class="x" onmousemove="('comment',' These are two technical terms: a 'vow' is a votive sacrifice, the particular animal having been unspecified when the vow was made; in a freewill-offering a particular animal was specified at the time of the vow. The difference is that in the former case, if the animal which he subsequently dedicates dies or is rendered unfit before it is sacrificed, he must bring another; but in the latter case he has no further obligation.');"><sup>12</sup></span> in connection with which the Divine Law states, [and he shall burn] upon it the fat of the peace-offerings [he-shelamim],<span class="x" onmousemove="('comment',' Lev. VI, 5.');"><sup>13</sup></span>