The Sages have said:

What is the cause of the mourning (Zechariah 12:10)? It is well according to him who explains that the cause is the slaying of Messiah, the son of Joseph, as it is written, 'And they shall look upon me whom they have pierced; and they shall mourn for him as one mourneth for his only son.'

Babylonian Talmud

Babylonian Talmud, Sukkah 52a

The Sages have said:

In the times of the Messiah, the L~rd shall manifest a second time His hand' (Isaiah 11:11). He shall be the Redeemer in person so that 'Israel shall be saved in the L~rd with an everlasting salvation' (Isaiah 45:17). And 'his rest shall be glorious' (Isaiah 11:10). All the world shall say, 'It is fitting that his rest shall be glorious, for while ordinary kings acquire glory for themselves through victorious wars, and do not believe themselves to be esteemed when they are at rest, he, on the contrary, without waging war makes everyone subject to him, and all render him homage.

Minha- Ghedola

Commentary Minha- Ghedola in the Grand Rabbinic Bible of Amsterdam, 1700-1705— Rabbinic Bible of Bombergi