Can employer ask me to resign without any valid reason

Hello every one Iam working as a sales and marketing manager for construction company since 4 years in Hyderabad and it is partner ship firm has it is a small company we wont be give a offer letter or pay slip i get paid my salary through cheque every month. The residential project we are working is now completed and the next venture will take 6 months time to start due to legal permissions for the construction. Now suddenly my boss asking me to resign without any written letter reason for asking resignation there is no work for next 6 months but he his only asking me to resign not other employees there other 3 employees other than me in our company And there is no misconduct of me so far and i haven't done wrong things in the company 2 months back he himself old that i want you to continue for next project but now suddenly dont know why he asking for resignation without any valid reason i request you to please suggest me what can good happen to me and can i go to labour court regard to this