Demai 6:10: A convert and a non-Jew who inherit from their non-Jewish father: he [the convert] can say to him: "You take the idol worship and I the money, you the wine and I the fruit." But if they have come into the possession of the convert, this is forbidden.

גר ועובד כוכבים שירשו את אביהם עובד כוכבים יכול הוא לומר טול אתה עבודת כוכבים ואני מעות. אתה יין ואני פירות ואם משבאו לרשות הגר אסור:

Demai 6:11: One who sells fruit in Syria and says: "These [fruits] are from the Land of Israel", one must tithe [the purchased fruit]. [If the seller says:] "Tithes have been taken from these [fruits]", he is trusted, as the mouth which caused the prohibition [by saying they are from Israel and therefore require tithes] is the mouth which made them permitted [by saying that tithes have already been taken]. [If the seller says:] "They are mine", one must tithe. [If the seller says:] "They have been tithed", he is trusted, as the mouth which caused the prohibition is the mouth which made them permitted. However, if it is known that he [the seller] has a field in Syria, one must tithe.

המוכר פירות בסוריא. ואמר משל ארץ ישראל הן. חייב לעשר. מעושרין הן נאמן. שהפה שאסר הוא הפה שהתיר. משלי הן חייב לעשר. מעושרין הן נאמן שהפה שאסר הוא הפה שהתיר. ואם ידוע שיש לו שדה אחד בסוריא חייב לעשר: