This is probably not what you're looking for, but at https://genius.com/Bts-not-today-lyrics I found the song, Not Today, by BTS, and it has one stanza that goes,

If you can't fly, then run
Today we will survive
If you can't run, then walk
Today we will survive
If you can't walk, then crawl
Even if you have to crawl, gear up
Aim your gun! Ready! Fire!

I also found something on page 310 of The Papers of Martin Luther King, Jr., that might come from the Langston Hughes poem, Mother to Son:

If you can't fly, run; if you can't run, walk; if you can't walk, crawl, but by all means, keep moving!

Here's a source that attributes the sentence to King, with a hat tip to Isaiah: https://literarydevices.net/if-you-cant-fly-then-run/

But there's no singing in any of these.