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 2.58

2.58

From the previous mudrā, disperse and extend the waters: this is called the Great Sīmā-Bandha.
Next is the mudrā of the Unendurable, the Great Powerful One, the Great Protector:
namely, with the form of the previous mudrā, hook the fires together so their tips bend and join,
extend the winds, and the rest is the same as before.