These are the things it is forbidden to sell to idolaters: itztirobalin, and white figs on their stalks, and frankincense, and a white cock. R’ Yehudah says: It is permitted to sell him a white cock among other cocks. When it is by itself, he [may] clip its toe and sell it to him, for they do not sacrifice anything defective to an idol.  All other things: if [their purpose is] unspecified —- it is permitted [to sell them]; but if [their purpose is] specified —- it is forbidden [to sell them]. R’ Meir says: Even fine dates (lit. date palm), and chatzav, and niklivam, it is forbidden for one to sell to idolaters.