It is narrated from Imam Ali (AS) who said:

Associate with experienced people, because they have attained these precious experiences by the most expensive prices, meaning spending their lives to get them. And you attain that precious thing in the cheapest way by spending a few minutes [1].

[1] Sharhe Nahjul Balaghah, Ibn Abel Hadeed, Vol. 20, page 335.

Source: en.shafaqna.com