Has Mahayana Buddhism ever rejected casteism?

I have read some early Buddhism sutras where the Buddha says birth doesn't make one noble, conduct does. Is there any sutra in Mahayana Buddhism that explicitly rejected "noble" status just by birth? Or at least rebuking casteism? I have found verses that conform to the caste based society like for example Lalitavistara Sutra that says Bodhisattvas are only born in upper two castes (Priest and Warriors). It does not say a person who rises to become a king, no, he should be from a "royal lineage" (caste). I have found no which eases the caste tension.