[If] one invites his fellow to eat with him, and [his fellow] does not trust him regarding tithes, [his fellow] says on the eve of the Sabbath: ‘‘What I will separate tomorrow, let it be maaser [rishon], and the rest of the maaser [rishon] is next to it. This [portion] that I have made maaser [rishon] is made into terumas maaser for it; the maaser sheni is on its northern or southern [side], and is deconsecrated on the coins.’’