The phrase "same flesh" means having a common ancestry or being closely related to someone. It implies that people share a biological connection or are part of the same family. Full definition
But «All flesh is not the same flesh» (1st Corinthians 15:39) «The dead [will be] judged out of those things which were written in the books, according to their works.» (religion.blogs.cnn.com)
39 All flesh is not the same flesh, but there is one flesh of men, and another flesh of beasts, and another flesh of birds, and another of fish. (religion.blogs.cnn.com)
We are all human beings born of the same flesh and we should learn to be more compassionate to each other. (religion.blogs.cnn.com)