Did Sai Baba practice a specific form of meditation? What was his core teaching or mantra?

According to the descriptions in Chapter 44, Sai Baba's meditation was encapsulated in the phrase "Allah Malik," which translates to "God is King." This phrase reflected his internal state, which was characterized as desireless, without pride, and free from greed or craving. This core teaching points to a state of complete surrender and the recognition of a single higher power as the ultimate sovereign. The text further elaborates on his divine nature by describing him as the "embodiment of consciousness" and the "abode of all happiness," whose grace can wash away sins.