Rasarnavasudhakara 1.286

1.286

atha saundaryam-
aṅga-pratyāngakānāṃ yaḥ sanniveśo yathocitam |
susliṣṭa-sandhi-bandhaḥ syāt tat saundaryam itīryate ||

Now, bodily symmetry (saundarya):
That arrangement of the major and minor limbs which is appropriate,
possessing well-knit joints, is called bodily symmetry.