WhatsApp में सारे contact को एक साथ मैसेज कैसे भेजें! How to send massage all contact in WhatsApp

Hello
Main is channel ka hostel rizwan Khan aapka swagat karta hun aur Maine is post mein hai yah bataya hai hai ki aap aap apne WhatsApp mein mein sare contact ko ek sath kaise bhejen
Whatsapp pay sare contact ko ek sath message bhejne ke liye tricks and trips bataiye gai hai