What is the most restrictive DFSG approved "Commercialism prohibited"

[Jari Aalto <jari.aalto@cante.net>]

I need to talk to upstrem that wants to prohibit commercial use of the
software. What Licence I should suggest to him?

The current hand written license permits the software to be used in
GPL programs -- except the ssoftware cannot be used for commercial
purposes.

Jari