O king, the Sompas, the Ekashringas, the Chaturvedas, and the Kalas (the four classes of the Pitris) are always worshipped amongst the four orders of men (namely Brahmanas, Kshatriyas, Vaishyas and Shudras).
सोमपा एकशृङ्गाश्च चतुर्वेदाः कलास्तथा। एते चतुर्पु वर्णेषु पूज्यन्ते पितरो नृप।॥