פירוש על תענית 45:14

Of that righteous man - Choni HaMe’aggel - he was distressed over this verse.

A song of Ascents: It is an expression of ascending.

We were like those who dream: The Babylonian exile, which was seventy years, was like a dream.

Seventy years in a dream: By way of a question: Is there someone who sleeps seventy years in his dream; and is there any person who sleeps seventy years at one time?

A song of Maalot, etc. Rashi explained, it is an expression of ascending (iluy). To here are his [words]. But in the chapter [entitled] HaChalil and in Tractate Makkot, it is explained that it is based on the fifteen ascending steps (maalot) in the Temple, in the courtyard.