Which of Sai Baba's teachings suggested that Shirdi itself was a primary pilgrimage site, negating the need to travel elsewhere?

Sai Baba repeatedly taught that Shirdi was a powerful pilgrimage site, making other journeys unnecessary for a faithful devotee. Chapter 4 provides several examples of this teaching. Baba told Das Ganu that Shirdi is like "Pandhari of Lord Vitthal" and "Dwarka City of Ranchhod," and one need not go far to see God. He demonstrated this teaching miraculously when Das Ganu wished to visit Prayag; Baba declared Shirdi to be Prayag and then produced the holy waters of Ganga and Yamuna from his own toes. The chapter concludes by stating that holy rivers themselves come to the feet of saints, so there is no need for a pilgrimage when one can be at the saint's feet.