The ruling on the hadith: (Whoever eats yakhna enters Paradise) and clarification of the meaning of yakhna

The Shaykh : The first Friday he gave a khutbah, "As for what follows: such and such, up to the end of it. The Messenger of Allah (peace and blessings be upon him) said such and such, and the Messenger of Allah said such and such, and the Messenger of Allah (peace and blessings be upon him) said: . The people started wanting to go out to the market and buy yakhna to enter Paradise. He had an agreement with the owner of a farm to collect what he had of yakhna next to the mosque, meaning... because they wanted to enter Paradise. This is one of the hadiths we heard from some of the shaykhs there in Damascus, from my own tribe, but it has no basis, not even among the fabricated ones.
The student : I mean, when it is said that it has no basis, that is a greater lie than it. It is not something strange, this.

The Shaykh : This is recklessness, recklessness beyond recklessness.
The student : Yakhna is the master of lukhna for us. Is there something called lukhna?
Another student: No, it is the cabbage, the cabbage. They call the cabbage yakhna.
Another student: They used to put the cabbage with us in the yakhna, meaning in this soup, they put the cabbage with it.
Another student: There is a thing called lukhna for us.
Another student: It is the same, Abu 'Adnan, this is it.
Another student: The cabbage.
Another student: He used to grow... then he started growing it in al-Zarqa, the lukhna, they wrap it like grape leaves.

The Shaykh : I think it is just the cabbage, but this...