Parallel
John 13:35
Patriarchal Greek New Testament (1904) · Berean Standard Bible
ἐν τούτῳ γνώσονται πάντες ὅτι ἐμοὶ μαθηταί ἐστε, ἐὰν ἀγάπην ἔχητε ἐν ἀλλήλοις.
By this everyone will know that you are My disciples, if you love one another.”