Romans 2:29
“But he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, and not in the letter; whose praise is not of men, but of God.”
also on the bible thing off the top of my head if i rememebr correct that's when gershom was supposed to be circumcisized but i gotta go back and read it one moment
also in the chapter God gives and shows many signs to show because he states at the start the egyptians shall beleive him and even perhaps the other israelites
after the sign of the circumcision of his own son, Moses goes and meets Aaron the father of the high priests by lineagewise and they prepare to go contend against Pharoah and all his magicans and false gods of Ta Meri Kemet
