I’m afraid you’ve crossed into Googleable territory, SIDI !
I Googled it (that’s how we think nowadays, especially if we’re ignorant and apathetic about a lot of Jewish music) and I came up with YBC’s “In a Song,” which isn’t a perfect match, so it must be the original song. Is the answer a live YBC medley?
(I also found out that there is a Jewish music wiki on Wikia.)