In 11/2016, in a televised award ceremony, Putin told Russian Children that "Russia's border doesn't end anywhere".
https://www.bbc.com/news/world-europe-38093468
In 10/2023, during his Q&A in the Valdai Discussion Club meeting, a Moscow-based think tank, Putin stated, “Russia’s border doesn’t end anywhere”.
https://www.instagram.com/putindirect/reel/C2Jb1O1r7W1/
In 01/2024, Putin put up an electronic billboard for his 2024 presidential election campaign, saying again “Russia’s border doesn’t end anywhere".
https://x.com/BBCSteveR/status/1746784252312891463