Acts 10:48 is an honestly interpretable example of something said in the Authority of Christ. It is made by the only one of the Apostles who was given the Authority to use the Keys to the Kingdom, Peter. And so we do find the Greek preposition "en" being used to denote, "fixed in" the Authority of.
prosetacen te autouj baptisqhnai en tw onomati tou kuriou tote hrwthsan auton epimeinai hmeraj tinaj
in the name of the Lord en tw onomati tou kuriou
And actually what that verse says in direct order, is, "He {Peter} commanded but them in the name of the Lord, to be baptized. Then they requested him to remain upon days some."
We must interpret each scripture accurately as it is. That is the only way to be truly faithful and obedient to God by His word.
prosetacen te autouj baptisqhnai en tw onomati tou kuriou tote hrwthsan auton epimeinai hmeraj tinaj
in the name of the Lord en tw onomati tou kuriou
And actually what that verse says in direct order, is, "He {Peter} commanded but them in the name of the Lord, to be baptized. Then they requested him to remain upon days some."
We must interpret each scripture accurately as it is. That is the only way to be truly faithful and obedient to God by His word.