Tosefta sur Rois 2 6:38

All the verses in the Torah which are written in obscene language are read in refined language, such as (Deut. 28:30), [which is written,] "You will betroth a woman, but another man will yishgalenah ('ravish her)," in every place where it is written yishgalenah, we read it as yishkavenah ("lie with her"); and such as (Deut. 28:27), [which is written,] "[God will strike you] with the boils of Egypt and with afolim ('hemmerhoids')," in every place where it is written afolim, we read it as tehorim ("tumors"); and such as (2 Kings 6:25-26), "a quarter of a kav of doves' divyonim ('excrement', considered softer than chiryonim, 'dung', as written) sold for five shekels," [and] (Is. 36:12), "to eat tzo'atam ('their own excrement', considered softer than chareichem, 'their own dung', as written) and drink their urine," [and] (2 Kings 10:27), "and they turned it (i.e., the temple of Ba'al) into motzaot ('latrines,' considered softer than chara'ot, 'outhouses', as written) until today." Rabbi Yehoshua ben Karcha says, [with respect to the last example,] "and they turned it into chara'ot (per GR"A)," we read it as it is written because the thing itself (i.e., the temple of Ba'al) is obscene.

How did Moses know where Joseph had been buried? They said: Serakh daughter, of Asher was of the same generation, and she went and said to Moses: "In the Nile River, Joseph is buried. And the Egyptians made for him metal skewers and affixed them with wood." Moses went and stood at the Nile River and said, "Joseph, the time has come for the Holy Blessed One to redeem Israel. Behold, the Shekhina is delayed for you, and the Israelites are delayed for you, and the clouds of glory are delayed for you. If you reveal yourself, good (okay!), and if not, we are cleansed of the oath which you have sworn upon our fathers." Then the coffin of Joseph floated to the surface and Moses took hold of it and went.