1. Spilling water near the bed:[1]

[After washing hands[2]] after intercourse, [the husband and wife] is to spill some water near the [marital] bed. [Doing so is a Segula for the child who will be born, and protects him from damage.[3] Likewise, it is done in order to banish Lilis from one’s midst and prevent her from nurturing from the drops of semen.[4] Doing so is similar to Mayim Achronim which takes place after eating, and is done in order to feed the Sitra Achara its portion.[5] Accordingly, it is to be spilled even if one’s wife cannot become pregnant from the intimacy.[6]]

How much water to spill:[7] One is only to pour out a small amount.

Where to spill the water:[8] It may be spilled anywhere near the bed. [It is to be spilled specifically near the bed, and hence spilling water down the sink does not suffice.]

[1] Admur ibid in Siddur; Zohar Vayikra 3:19; Mishnas Chassidim Miseches Shechiva 11:11; Siddur Arizal Reb Shabsi; Or Tzadikim 27:16; Morah Ba’etzba 2:55; Kaf Hachaim [Falagi] 4:1; Pischeiy Olam 240:41; Kaf Hachaim 240:67; Darkei Chaim Vehslaom 346; Piskeiy Teshuvos 240:30; Sheyikadesh Atzmo 39:7

[2] Implication of Admur ibid in Siddur; Kaf Hachaim [Falagi] ibid

[3] Or Tzadikim ibid; Siddur Arizal ibid; Kaf Hachaim ibid; See Sheyikadesh Atzmo 39 footnote 12

[4] Mishnas Chasisidm ibid; Shulchan Hatahor 240:7

[5] Matok Udevash on Zohar ibid

[6] Setimas Admur and Poskim ibid; Sheyikadesh Atzmo 39:8

[7] Siddur Arizal ibid; Or Tzadikim ibid

[8] Implication of Admur ibid, Or Tzadikim ibid, Kaf Hachaim ibid that it is spilled one-time anywhere near the bed. However, see Mishnas Chassidim ibid who implies that it is to be spilled around the entire bed.