Is it permissible to perform Hajj with money that has been mixed with some earnings obtained by coaxing, enticing, or pressuring students, and not by threatening them?

A pilgrim must spend from lawful and good money during their Hajj, as Allah Almighty says: "O you who have believed, spend from the good things which you have earned," and in the Hadith: "Indeed, Allah is good and accepts only what is good." If someone performs Hajj with unlawfully acquired money, their Hajj is valid, and the obligation is fulfilled, but there is no reward for it. This is the view of the majority of scholars. One must be keen on spending good money. If the girls benefited from your private lessons, there is no harm in the money you received from them. And remember the Hadith of Wabisa: "Consult your heart. Righteousness is that about which the soul feels tranquil and the heart feels tranquil. And sin is what wavers in the soul and moves to and fro in the breast."