"Had an engrossing conversation with Sri M. He is a scholar & spiritual powerhouse, well-versed in the Gita & Quran," he tweeted.
Sri M was born as Mumtaz Ali Khan on November 6, 1948 in Kerala and was exposed to Hinduism and Christianity in his early childhood.
"With a message of hope, love, peace, harmony & oneness, Sri M is walking across India. I appreciate his efforts & commitment to these causes," Modi added.
Sri M started a padayatra called "Walk of Hope" from Kanyakumari to Kashmir covering 6500 km on January 12 this year, marking the birth anniversary of a great prophet of interfaith harmony, Swami Vivekananda.