How long should I wait for my new Boss to send me my work hours for the week?

I start a new job next week and my Boss still has not send me my work hours it's been 48 hours.
Updates
8 mo
O I did text my boss 3 times kept saying he will send them over but still didn't. Said he would send it over by 5pm today still nothing
Updates
8 mo
Told the job I won't be working for them that i had another job do this to me with 2 weeks going by with no start date. I told them to many red flags for me that its highly unprofessional to promise to send out work hours Twice then never doing it.
How long should I wait for my new Boss to send me my work hours for the week?
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