Mahanidhi Madan Gopal Das
As Saktas (Durga worshipers) chant japa on rosewood beads and Saivites (Siva worshipers) chant on rudraksa beads, Gaudiya Vaisnavas chant japa on tulasi beads. Since Tulasi-devi is Kṛṣṇa’s favorite plant, the Lord shows special favor to anyone who wears, holds or worships Tulasi-devi.
In the Hari-bhakti-sudhodaya the messengers of Yamarāja tell a Vaiṣṇava brāhmaṇa: “We did not understand. Lord Hari loves Tulasī-devī. When a person carries Tulasī in his hand, Lord Hari follows him and gives him all protection.”
An excerpt from the book Art of Chanting