a kutya ugat, a karaván halad
Definition from Wiktionary, the free dictionary
Literally: "the dog barks, the caravan proceeds"
-  According to this source, this was said in Hungarian first by Ferenc Pulszky and it comes from the Turkish language.
-  This website explains the following: İt ürür kervan yürür - An ancient Turkish proverb. Its first known occurrence is in Muhammad Shaybani Khan's "Divan" (a collection of poems, 1608-09). It is an assertion, with some irony, that "You are too insignificant to influence the course of events that surround you," i.e. "You're not such a big deal."