Ali-Shir Nava'i
In the post-Mongol period we find that Ali-Shir Nava'i refers to the Iranian people as "Sart Ulusi" "Sart people", and for him "Sart tili" "Sart language" was a synonym for the Persian language. Similarly, when Babur refers to the people of Margilan as "Sarts", it is in distinction to the people of Andijan who are Turks, and it is clear that by this he means Persian-speakers. He also refers to the population of the towns and villages of the "vilayat" of Kabul as "Sarts".