Mary's."
~~~
Luke 2:29-32 "Lord, now lettest thou thy servant depart in peace, according to thy word: For mine eyes have seen thy salvation, Which thou hast prepared before the face of all people; A light to lighten the Gentiles, and the glory of thy people Israel."
"Lord," - Simeon is talking to God the Father.
"...now lettest thou thy servant depart in peace, according to thy word:" - (see Luke 2:25-26)
"For mine eyes have seen thy salvation," - God sent His Son to die for the sins of the whole world..
"Which thou hast prepared before the face of all people;" - God the Father
"A light to lighten the Gentiles, and the glory of thy people Israel." - God the Son.
Yes, “thy salvation” refers to the salvation done by the father. But who has been saved by the father? He’s looking forward to the salvation of Israel, but in whom has he seen this salvation made manifest?