Verses with the word sinai in the New Testament (2 verses):

Galatians 4:24
Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar.

Galatians 4:25
For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children.