Marrying 2nd wife without 1st wifes permission

Assalamualaikum Warahmatullahi Wabarakatuh
. I wanted to asked if a man is allowed to marry a 2nd wife without asking the 1st one … because same say that in khadis written that he is, and same say that in khadis written that he has to ask his 1st wife… I know that there are masla when yes… can u please tell me how it is in Islam…. And where can I read

thanks …