As per notification 8/2017, purchase from URD in a day upto 5,000/-, no GST. Per day means we need to look at the date of invoice or receipt of goods or receipt of invoices on same day. For example, two invoices dated 5th July, we receive on 6th July and 7th July exceeding 5,000 in total or two different dated invoices receive by us on one particular date exceeding 5,000/-. Hope you may understood the issue?