Halakhah su Salmi 49:2

If an orphan is present in the cemetery, then, after the burial, (if it is still day) the people should step away a distance of at least four amos from the graves and recite the psalm, "Lamenatzaich" ("To the chief musician") etc. "Shimu Zos" ("Hear this") etc.⁶Psalms 49. On a day when Tachanun is not said, "Michtam Le'Dovid" etc. is said.⁷Psalms 16. The orphan then says the Kaddish: "D'Hu Assid Lehischadetah" ("That he will renew"), and those present recite with him up to "Vikarei" (And may this happen). In some communities it is customary that the Kaddish is recited first before the burial, following Tzidduk Haddin. There are communities where even Tzidduk Haddin is not said until after the burial.

Mourners should observe their mourning in the place where the soul of the deceased departed, for in that place, the soul of the deceased grieves, and that is the place to comfort it. It is a mitzvah to pray there with a minyan of ten men in the morning and evening, even if there is no mourner present, for it is a consolation for the soul. If there is a mourner present, he may be counted in the minyan. A Seifer Torah should be brought there earlier, and a suitable place should be prepared for it, for the entire time they will pray there. If two deaths occurred in two separate houses, in one of which there is a mourner, while in the other there is no mourner, and there are not enough worshipers in the city to have a minyan of ten pray in each house, they should pray in the house where there is no mourner. In the house of the deceased it is customary to say, Psalm,⁹Psalms 49. "Lamanetzeach, etc. Shimu Zoss Kol Ha'ammim" etc. after Shacharis and Minchah. And it is certainly good to study Mishnayos there, for the benefit of the soul. (The Hebrew letters of the word Mishnah. are the same as the word neshoma (soul).)