Now since a great sacrifice by Kassapa of Uruvela was near at hand, and since he saw that this latter would fain have him away, he, the victorious over enemies, went to seek alms among the Northern Kurus; and when he had eaten his meal at evening time near the lake Anotatta, the Conqueror, in the ninth month of his buddhahood, at the full moon of Phussa, himself set forth for the isle of Lanka, to win Lanka for the faith. For Lanka was known to the Conqueror as a place where his doctrine should (thereafter) shine in glory; and (he knew that) from Lañkä, filled with the yakkhas, the yakkhas must (first) be driven forth.
... sure certain wholesome pride is good, but it's probably not so good if it goes on account of what might be not really rightous gained.
Fourth Marvel.
(Mv.I.19.1) [43] At that time, Uruvelakassapa had prepared a great sacrifice. (People from) the whole area of Magadha and Aṅga wanted to come, bringing along lots of staple and non-staple food. Then the thought occurred to Uruvelakassapa, “Right now I have prepared a great sacrifice, and (people from) the whole area of Magadha and Aṅga will come, bringing along lots of staple and non-staple food.
“If the great contemplative performs a marvel in front of the large crowd of people, his gains and honor will increase while my gains and honor diminish.
“Oh, I hope the great contemplative doesn’t come tomorrow!”
(Mv.I.19.2) Then the Blessed One, having known with his awareness the train of thought in Uruvelakassapa’s awareness, went to the northern Kuru country and, taking almsfood from there, consumed it at Anotatta[5] Lake and spent the day right there.
As the night was ending, Uruvelakassapa went to the Blessed One and, on arrival, said to him, “It’s time, great contemplative. The meal is ready.
“Why didn’t you come yesterday, great contemplative?
“And we even thought of you, ‘Why isn’t the great contemplative coming?’
“Your share of staple and non-staple food[6] was set aside.”
(Mv.I.19.3) “Didn’t it occur to you, ‘Right now I am preparing a great sacrifice, and (people from) the whole area of Magadha and Aṅga will come, bringing along lots of staple and non-staple food.
“‘If the great contemplative performs a marvel in front of the large crowd of people, his gains and honor will increase while my gains and honor diminish.
“‘Oh, I hope the great contemplative doesn’t come tomorrow!’?
(Mv.I.19.4) “Kassapa, having known with my awareness the train of thought in your awareness, I went to the northern Kuru country and, taking almsfood from there, consumed it at Anotatta Lake and spent the day there.”
The thought occurred to Uruvelakassapa, “He’s powerful, the great contemplative, and mighty, in that he knew (my) awareness with (his) awareness. But still, he’s not an arahant like me.”
Then the Blessed One ate the meal provided by Uruvelakassapa and stayed on in the forest grove.
There are some teachers here as well, having found Kamboja repeated in the texts, possible not knowing of the old tribe of kambos north of the area the Buddha uses to dwell, and try to gain some fuel for using the power of pride to unite people for their worldy aims. Nevertheless, it's not known that such was ever added into the Tipitaka by the Sangha here. So just stories for certain political interests.
My person is how ever, not familar with the Mahavamsa.
Khmer used to develop a kind of "copy" of the hindu mythology, replacing certain names and geography there. Maybe similar to the history of Mahavamsa, or like Christians in Africa pain Jesus black, in Asia giving him Asian lookalike... to win those with strong Sakaya diṭṭhi, getting all united under this "trick". Understandable, of course.
Jāti is the cause of suffering should be not forgotten. Strong attachment to jāti even cause for much additional unskilful deeds.
Totally fine if by heart a Anussavika and finding certain happiness in what has been gone for sure, not present, not witnessed, even missing this "reality". Just look if things do not simply start to cause suffering and pain, conflicts, fear..., if made ones own.
And much mudita if such can be found. Blessed if having relicts serving to increase Saddha toward the Dhamma, suffering, it's cause, it's ending and the path of leaving house and what ever kind of identification finally.