The post Christian is referring to: “Karaniya Metta Sutta – Metta Bhavana“.
– Please always provide a link to the post, if the question is about a post.
At the end of the #10 verse is, “..Na hi jātugabbaseyyam punaretī”ti.
“gabba” is womb. So, this part of the verse is: “will not again have a birth involving a womb”.
All the realms above the human realm involve ONLY instantaneous (opapatika) births. This includes the deva realms and the brahma realms. None of those births require a mother’s womb.
When one attains the Sakadagami stage, one will never be reborn in a realm below the deva realms. Of course Anagamis will only be born in the brahma realms reserved for them, and Arahants will not be reborn in any realms in this world.
– Thus all Ariyas at and above the Sakadagami stage would qualify. I slightly re-worded the translation to emphasize this point.