Northampton ran in nine tries to rout French side Bayonne 61-14 on Friday and reach the Champions Cup knockout round.
Flanker Tom Pearson scored a hat-trick and prop Alex Waller grabbed a brace of tries.
The Saints had led 42-0 at halftime with Tommy Freeman, Courtney Lawes and Curtis Langdon all crossing.
Tom James added the ninth try while Fin Smith kicked eight conversions as the Premiership leaders swept to a third win in three pool matches.
Bayonne only got off the mark in the 65th minute through a Tom Spring try with Aurelien Callandret adding a late score to at least take the French side into double figures.
Marching on in Europe 💫
— Northampton Saints 😇 (@SaintsRugby) January 12, 2024
Tonight's win means we are the first side into the knockout stages of the Investec @ChampionsCup 🙌 pic.twitter.com/VmSjnCuu6j