Reference for Yoma 106:1
אמרו ליה לרב יוסף הכי עביד רבא אמר ליה יהא רעוא דתרום רישך אכולה כרכא
The people told R'Joseph that Raba did that, whereupon he said to him: May it be the will [of God] that you raise your head above the whole city.<span class="x" onmousemove="('comment',' R. Joseph being blind would not have noticed this reverent conduct of his pupil. On learning it he pronounced a prayerful hope, which was fulfilled. For Raba did become head of the Academies of both Sura and Pumbeditha.');"><sup>1</sup></span> R'Alexandri said in the name of R'Joshua B'Levi: One who prays [the 'Amidah]<span class="x" onmousemove="('comment',' Lit., ' (prayer read) standing'. The prayer par excellence, v. P.B. p. 44ff.');"><sup>2</sup></span> should go three steps backwards, and then recite 'peace'.<span class="x" onmousemove="('comment',' At the end of that prayer one says: May He who maketh peace in His high places, make peace for us and for all Israel. This is the pronouncement of 'peace'.');"><sup>3</sup></span>