John Gill Commentary Luke 9:50

"But Jesus said unto him, Forbid [him] not: for he that is not against you is for you." — Luke 9:50 (ASV)

And Jesus said unto him, forbid him not
"Or forbid not" him, or any other so doing:

for he that is not against us, is for us:
in two exemplars of Beza's it is read, "for he is not against you": the Vulgate Latin, and Syriac versions, instead of "us", in both clauses read "you", and so likewise the Persic and Ethiopic versions; (See Gill on Mark 9:39), (See Gill on Mark 9:40).