עַל שְלֹשָה דְּבָרִים הָעוֹלָם עוֹמֵד- עַל הַתּוֹרָה וְעַל הָעֲבוֹדָה וְעַל גְּמִילוּת חֲסָדִים.
(מִשְנָה, מַסֶּכֶת אָבוֹת, פֶּרֶק א, מִשְנָה ב)
Al shelosha devarim ha’olam omed- al ha-tora ,ve-al ha-avoda, ve-al gemilut chasadim
On three things the world stands - on the Tora, on God worship and on charity (benevolence)
(Mishna, tractate Avot, chapter 1, Mishna 2)
This sentence from the Mishna, that was written 2000 years ago, tells us what are the important things in our life: the five books of Moses with all the commandments, worship of God, especially the Priests in the Temple and loving each other with no limits: helping the poor, sincere charity, philanthropy, loan to the poor without interest, benevolence and favor.
The song is very popular, especially in religious ceremonies.