⟨ѯ⟩ and ⟨ѱ⟩ derived from Greek letters xi and psi, used etymologically though inconsistently in secular writing until the eighteenth century, and more consistently to the present day in Church Slavonic.

  Ԫ
аз буки веди глаголь добро есть живете зело, земля, и иже и како люди мыслете наш он покой рцы слово твердо ук ферт хер цы червь ша ер ять ю