If you are being paid minimum wages as per the Government-notified rates, then the weekly off is included in the payment. Indeed, the minimum wages for one day as per the government notification actually represent wages for one and one-sixth day. Therefore, in every six days of wage payment, an employee receives seven days' worth of payment. The daily wage is derived by dividing the monthly wages by 26.
Weekly holidays
Regarding your query on the legal provision for paid weekly offs, please refer to Section 52(1) reproduced below:
(1) No adult worker shall be required or allowed to work in a factory on the first day of the week (hereinafter referred to as the said day), unless
(a) he has or will have a holiday for a whole day on one of the three days immediately before or after the said day.