Egyptian Book of the Dead
Chapter CLVI
The blood of Isis, the virtue of Isis; the magic power of Isis, the magic power of the Eye are protecting this the Great one; they prevent any wrong being done to him
This Chapter is said on a buckle of carnelian dipped into the juice of ankhamu, inlaid into the substance of the sycamore-wood, and put on the neck of the deceased
Whoever has this Chapter read to him, the virtue of Isis protects him; Horus the son of Isis rejoices in seeing him, and no way is barred to him, unfailingly