觀無量壽佛經義疏 3.81

3.81

「『其天冠中有一立化佛，高二十五由旬。』」冠中化佛，以表帶果而行因。四、觀面。

"[The Buddha said:] 'Within that heavenly headdress is a standing transformative Buddha, twenty-five yojanas in height.'" The transformative Buddha in the crown represents carrying the fruition while practicing the causal stage. Fourth, contemplating the face.