Where in Scripture is "sanctification" a process?

Clarification:

I am not referring to the process of "transformation"/"glorification" —i.e., those in Christ being transformed into Christlikeness (cf. 2 Cor 3:18, Rom 12:2).

I am referring to the use of the language of "sanctification". Is it ever an ongoing process within Scripture?

I could not find proof texts, so hoping for some help!

Edits: spelling