Interpretation request

Under offences and penalties of the GST Act. The following is one of the section which is as follows:
122. (1) Where a taxable person who––

(i) supplies any goods or services or both without issue of any invoice or issues an incorrect or false invoice with regard to any such supply;
👆based on the above text, with regard to the word " invoice", do we have to interpret as invoice only or invoices also. Kindly advice.