What is the ruling on teachers consuming meals that they ask students to bring, believing that this falls under the category of a gift, and justifying the permissibility of their action by saying that a gift should not be refused?

Meals presented by students to teachers are considered valid gifts if they are offered as a gesture of honor and affection without any request from the teachers. However, if teachers request them, then it is not a gift but rather an unlawful consumption of people's wealth, because students pay them out of fear or shyness, and taking money for these two reasons is forbidden. Teachers must allow students the freedom to give or withhold, then observe whether gifts are given to them or not. They are only entitled to their wages or what students willingly offer.