大毘盧遮那經廣大儀軌 2.190

2.190

次右蓮華中，觀輸嚕吽（二合）字門，
現發生佛頂，印與蓮華同，
發生世出世，三乘諸聖眾。

Next, in the lotus on the right, visualise the syllable śruṃ gate,
Manifesting Abhyudgatoṣṇīṣa; the mudrā is identical to the lotus,
Giving rise to the holy assemblies of the three vehicles, mundane and supramundane.