Yosef Karo, Translation:Shulchan Aruch — Orach Chaim 339…
“ And we do not do chalitza nor we do yibum [levirate marriage] , nor do we have a wedding, nor do we dedicate objects to the temple, nor do we dedicate the value of a person or an animal to the Temple, nor do we renounce private use of an object, nor do we separate trumot or maasrot, nor do we redeem a firstborn son [ [ [wikipedia:pidyon haben|pidyon haben] ] ] , nor do we divorce unless he is very ill (the world is weighing heavily on him) . ”
