Isaiah 51:12 (King James Bible) who art thou that thou shouldest be afraid of a man
As discussed under 1 Nephi 20:5, we will let the earliest textual sources determine whether the inflectional ending for the modal verbs would and should is -est or -st. Here in 2 Nephi 8:12, the earliest textual source (the printer’s manuscript) reads shouldst rather than shouldest (the corresponding King James form of the modal verb).