John Lightfoot on Luke 20:46

[Which desire to walk in long robes.] In garments to the feet; in long robes: which their own Rabbins sufficiently testify. "R. Jochanan asked R. Banaah, What kind of garment is the inner garment of the disciple of the wise men? It is such a one, that the flesh may not be seen underneath him." The Gloss is, It is to reach to the very sole of the foot, that it may not be discerned when he goes barefoot. "What is the 'talith,' that the disciple of the wise wears? That the inner garment may not be seen below it to a handbreadth."

What is that, Luke 15:22, the first robe? [the best robe, AV]. Is it the former robe, that is, that which the prodigal had worn formerly? or the first, i.e. the chief and best robe? It may be queried, whether it may not be particularly understood the talith as what was in more esteem than the chaluk, and that which is the first garment in view to the beholders. "I saw amongst the spoils a Babylonish garment, Joshua 7. Rabh saith, A long garment called melotes." The Gloss is, "a 'talith' of purest wool."