Reference for Pesachim 6:2
והכתיב (שמואל א כה, כ) והיא רוכבת על החמור התם משום ביעתותא דליליא אורחא הוא ואיבעית אימא משום ביעתותא דליליא ליכא משום ביעתותא דדוד איכא ואיבעית אימא ביעתותא דדוד נמי ליכא משום ביעתותא דהר איכא
Another alternative: there was no fear of David either, but there was the fear of the mountain. Yet is not 'unclean' written in Scripture?<span class="x" onmousemove="('comment',' It occurs many times. The circumlocution employed in the cited instances merely serves to indicate that delicate phraseology is a matter which must also enter into consideration, v. Rashi.');"><sup>2</sup></span> Rather wherever they are equal[ly convenient], [Scripture] discourses in a refined language; but wherever more words would be required, the shorter phraseology is employed. As R'Huna said in Rab's name - others say, R'Huna said in Rab's name on R'Meir's authority: one should always teach his pupil in concise terms.