Recep Tayyip Erdogan doubled down on his accusations against France on Monday, officially calling for a boycott of French goods.

“Just like they say, ‘Don’t buy good with Turkish brands’ in France, I am calling to all my citizens from here to never help French brands or buy them,” Erdogan said, again questioning the “mental health” of President Emmanuel Macron. Turkey’s leader already targeted the French president over the past few days and the offensive remarks have prompted Paris to recall its ambassador from Turkey.

Paris has recently tightened its approach towards hardline Islamists, vowing to eradicate the radical ideology in the country. Early in October, Macron said Islam had been in crisis worldwide due to the rise of fundamentalists.

The rhetoric of the French leadership became even tougher after the gruesome murder of teacher Samuel Paty, who was beheaded outside Paris. The attack apparently came in retaliation for the teacher show cartoons of the Prophet Mohammad from the Charlie Hebdo satirical magazine during a class on free speech.

Macron has hailed Paty as a “hero,” who represented all the secular and free-thinking values of the French republic.

“He was killed because Islamists want to take our future,” Macron said while paying a tribute to the teacher. “They will never have it.”