攝大毘盧遮那成佛神變加持經入蓮華胎藏海會悲生曼荼攞廣大念誦儀軌供養方便會 2.19

2.19

Form inner fists with samādhi and prajñā; erect and join fire and space together;
Bend the winds to hold the fires, shaped like a precious jewel.
This mudrā is the mahāmudrā, namely the Tathāgata-Uṣṇīṣa;
The moment one forms it, one is identical to the World-Honoured One.