大佛頂如來放光悉怛多般怛羅大神力都攝一切呪王陀羅尼經大威德最勝金輪三昧呪品 1.117

1.117

「以左右手合掌當心上，胡跪坐。以左手中指屈押右手中指中節背上，二大母指向前，餘指合之。若呪師未作壇，但每作此印向佛前誦呪七遍，燒香頂禮即誦，滅八十劫重罪。」

"Place the left and right hands palm-to-palm at the heart and kneel with one knee on the ground. Bend the left middle finger and press it onto the back of the middle knuckle of the right middle finger; point the two thumbs forward, and join the remaining fingers together. If the mantra master has not yet constructed a maṇḍala, he need only make this mudrā before the Buddha, recite the mantra seven times, burn incense, and prostrate with the head to the ground, reciting it, to eradicate the grave sins of eighty kalpas."