There were once three men, well-versed in udgîtha, Silaka Sâlâvatya, Kaikitâyana Dâlbhya, and Pravâhana Gaivali. They said: 'We are well-versed in udgîtha. Let us have a discussion on udgîtha.'
In plain words: Three men skilled in the udgitha (the main sacred chant) were Silaka, Dalbhya and Pravahana. They agreed to sit down and discuss it together.