ottoman knife help with translation

[Turkoman.khan]

Originally Posted by chregu

my latest find
Knife 27cm
Blade of fine Wootz steel, with gold koftgari
Handle is three-piece and made of brown jade with gold inlays. the end of the handle is decorated with a red agate (?).
Silver scabbard, unfortunately the tip is missing
I would like to hear the specialists' opinion on this knife and a translation of the writing would certainly be very helpful.

thank you all for taking the time.
greetings from Switzerland

Hello chregu

Congratulations! Magnificent knife.
I asked for my friend's help in translating. Here is what he writes:
Well known saying for Turkish (Seljuk) thinker and statesman Ahi Evran:
Gelen gelsun saadetle, Giden getsun selametle.
كلان كلسون سعادلة، كيدن كيتسون سلامتلة.
Translation: Everyone is wellcomed to be one of us, however, we welkcome his leaving us if he asks to leave.