Augustine of Hippo
The remaining elements in the account of the anointing with the precious oil should not be disputed. If both Matthew and Mark recount the displeasure of all the disciples while John mentions only Judas, it may suggest that by the term disciples, the evangelists were including Judas. This is similar to how Philip’s inquiry during the feeding of the five thousand was presented in the plural rather than the singular. It is also plausible that the other disciples felt the same indignation, whether by expressing it or by siding with Judas' remarks. This overall sentiment is what Matthew and Mark intended to convey. However, the disciples had a genuine concern for the less fortunate, whereas Judas was known for his dishonesty, prompting John to single out the one whose avarice is particularly highlighted in this instance.