In Kularnava Tantra. Chapter 13, Lord Shiva talks about guru and his characteristics. He says following verse :
śaive gurutrayaṃ proktaṃ vaiṣṇave guru pañcakaṃ
vedaśāstreṣu sataso gururekaṃ kulāgame
According to Shaiva Tradition, Gurus are three, according to Vaishnava, Gurus are five, according to Vaidika Tradition Gurus are numerous but according to Kula Agama Guru is only one.
What is the meaning of the text in bold? What does Lord Shiva mean when he says according to Vaishnava tradition, there are five gurus?
Related question about Shaiva gurus on the same verse by Rickross: What does Lord Shiva mean by saying that in Shaiva traditions Gurus are three?