Mishnah for Bekhorot 60:20
בין כך ובין כך מקבלין אותו והוא למד כדרכו והולך:
Our Rabbis taught: If one applies to become a haber, if we saw him practising these privately at his house,<span class="x" onmousemove="('comment',' Prior to agreeing to observe them publicly so that he cannot be accused of doing so merely for show.');"><sup>8</sup></span>
Mishnah Demai
One who takes upon himself to become a “chaver” may not sell to an am haaretz either moist or dry [produce], nor may he buy from him moist [produce], nor may he be the guest of an am haaretz, nor may he host an am haaretz as a guest while [the am haaretz] is wearing his own garment. Rabbi Judah says: he may not also raise small animals, nor may make a lot of vows or merriment, nor may he defile himself by contact with the dead. Rather he should be an attendant at the house of study. They said to him: these [requirements] do not come within the general rule [of being a chaver].
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