Generally, the suttas say "a being" is "reborn", as follows:
When the mind was thus concentrated, purified, bright, unblemished,
rid of defilement, pliant, malleable, steady, & attained to
imperturbability, I directed it to the knowledge of the passing away &
reappearance of beings. I saw — by means of the divine eye, purified &
surpassing the human — beings passing away & re-appearing, and I
discerned how they are inferior & superior, beautiful & ugly,
fortunate & unfortunate in accordance with their kamma: 'These beings
— who were endowed with bad conduct of body, speech & mind, who
reviled noble ones, held wrong views and undertook actions under the
influence of wrong views — with the break-up of the body, after death,
have re-appeared in the plane of deprivation, the bad destination, the
lower realms, in hell. But these beings — who were endowed with good
conduct of body, speech, & mind, who did not revile noble ones, who
held right views and undertook actions under the influence of right
views — with the break-up of the body, after death, have re-appeared
in the good destinations, in the heavenly world.' Thus — by means of
the divine eye, purified & surpassing the human — I saw beings passing
away & re-appearing, and I discerned how they are inferior & superior,
beautiful & ugly, fortunate & unfortunate in accordance with their
kamma.
MN 4
The suttas say "a being" is merely a "view" of "attachment":
Why now do you assume 'a being'? Mara, have you grasped a view? This
is a heap of sheer constructions: Here no being is found.
SN 5.10
'A being,' lord. 'A being,' it's said. To what extent is one said to
be 'a being'?"
"Any desire, passion, delight, or craving for form, Radha: when one is
caught up there, tied up there, one is said to be 'a being.'
"Any desire, passion, delight, or craving for feeling... perception...
fabrications...
"Any desire, passion, delight, or craving for consciousness, Radha:
when one is caught up there, tied up there, one is said to be 'a
being.'
"Just as when boys or girls are playing with little sand castles:
as long as they are not free from passion, desire, love, thirst,
fever, & craving for those little sand castles, that's how long they
have fun with those sand castles, enjoy them, treasure them, feel
possessive of them.
SN 23.2