Jastrow, שׂוּם 1

שׂוּם, שִׂים (b. h.; v. סוּם) to place, put, appoint, make. Ber. 39ᵇ ששַׂמְתָּ שלום וכ׳ thou hast made peace between the scholars. Mekh. B’shall. introd. במקום הזה שָׂמוּהוּ in this place they (the Egyptians) have put him (Joseph). Ber. 28ᵇ מודה … ששמת חלקי וכ׳ I thank thee, O Lord, that thou hast appointed my lot to be with those who sit in the school-house, and not with those who abide at the corners (idlers); a. fr.
    Hif. - הֵשִׂים same. Yeb. 45ᵇ שאתה מֵשִׂים, v. מְשִׂימָה. Ber. 16ᵇ ותָשִׂים חלקנו וכ׳ and that thou mayest place our lot in paradise. Ib. שתשים שלום וכ׳, v. פַּמִילְיָא. Snh. 99ᵇ כל העוסק … משים שלום וכ׳ whosoever is engaged in the study of the Law for its own sake, causes peace to reign &c.; a. e.