This paper in general looks well prepared. The following is comments and suggestions to improve the paper.

Introduction:
- This paper has significant intersections with a recent review from Tareq Rasul (2019) “The trends, opportunities and challenges of halal tourism: a systematic literature review, Tourism Recreation Researchâ€. Hence, the author(s) is suggested to make it a reference as well as explain the difference between the current review and Rasul’s review.
- Reference is needed to support paragraph 2.

Literature review:
- The dominant material in this section is Mastercard-CrescentRating, which is not an academic article, the author(s) is advised to use academic literature as the main material for this section.

Method:
- Why English only? Because many articles on this topic could be published in Bahasa, Malay or Arabic.
- Why 10 years?
- Why doesn’t the author(s) limit their search to journal articles only as common in review?
- Who developed VOSViewer? It should be cited as a reference in this section.
- The article searching process is quite clear, how the articles’ attributes (year, country, etc.)  analyzed also clear, but how the articles’ content or findings analyzed is still unclear.

Results and discussion
- Page 7-9 is very minimal, almost not, citing academic references
- Table 5 is good (but check the source: processed data or data processed?)
- Table 8-10 is good
- In general, this section appears systematic, but when discussing the findings, it appears to be very minimal in connection to the previous academic literature.

Conclusion
- What is the implication of this review to the academic, practice, and policy-makers? It would be good if it could be explained in this section.
- The topic discussed is highly impacted by the pandemic. It would be better if in this section or another section the author(s) discusses it.
- Limitations that can also be added is the selection of document types that are not restricted to certain document types (e.g. journal articles).

Thank you.