وَإِنْ طَيَّبَ أَقَلَّ مِنْ عُضْوٍ فَعَلَيْهِ صَدَقَةٌ
Translation: If perfume is applied to less than an entire body member, charity is due.
The phrase less than a member contrasts with the preceding entire-member threshold. Both describe impermissible application, but the prescribed compensation changes.
The governing measure is the portion of the body treated, not simply a casual description such as “a little perfume.” Multiple applications and other details require separate analysis.