This is the 16613th most frequent Russian word.
селах
"Селах" is a term in biblical texts, often interpreted as a pause or musical interlude.
In this sentence, 'селах' is a form of the word 'сёла', meaning 'villages'. It is in the prepositional case, which is used to indicate location or context.
Он посетил музеи в маленьких селах России.
He visited museums in small villages of Russia.
Here, 'селах' also stands for 'villages' but emphasizes their quality (picturesque) or inhabitants. Again, it is in the prepositional case.
В этих живописных селах живут гостеприимные люди.
Hospitable people live in these picturesque villages.
Finally, 'селах' in this sentence indicates origin or a related topic of conversation about the villages, fitting its usage in the prepositional case.