Exceedingly great care must be taken and the main precaution is to guard oneself from sexual imaginings. The discussions in the Palestinian and Babylonian schools in the post-Mishnaic period. The Babylonian Gemara was completed circa 500 ce. One of the chief functions of the Gemara is to find support for the laws of the Mishnah from the Bible. Suffer not Eccl.
Foundation is symbolized by the penis.
Wherefore should God be angry Eccl. Furthermore, the word 'bow' is used in Rabbinic literature as a synonym for penis. 13 end 25b-26a.