There is a song that in my synagogue they sing every shabat night before beginning kabalat shabat:
'אילו היה לי כוח הייתי יוצא לשוק הייתי מכריז ואומר שבת היום לה
(If I had the strength I would go out to the market and I would declare and say that Shabbat is a day for Hashem)
Does anybody know the origin of this song? I think i heard once that it was composed by an holocaust survivor that hated the shabbat when he was little because their parents forced him to keep it, but then during the holocaust that was the thing he missed the most, and he promised to himself that if he survived he would keep shabbat forever and go out in the streets saying how good it is, but i heard this a long time ago and i don't remember the details of the story... Does anybody know anything about it?