Tehillim(Psalms): 39-43.


To avert Chibut hakever ("Purgatory of the grave") [1] recite words of
Torah, Tehillim, etc., for one sixth of the day. [2] To merit purity
of the soul that obviates Kaf Hakela ("the hollow of a sling"),
spend as much of the day as possible in reciting Tehillim(psalms) by heart.

Notes:

1. Tanya p. 29 and p. 33. This and Kaf Hakela (below) are processes of
purgatory undergone by the soul after death.

2. Namely, four hours.