大毘盧遮那經廣大儀軌 2.116

2.116

左赤蓮華中，觀污字光輪，
轉成不思議。慧空風持珠。

In the red lotus on the left, visualize the light-wheel of the syllable u,
which transforms into Acintyamati;
the prajñā space and wind hold a jewel.