[1] þystir hann ‘he thirsts’: The verb is impers. The form without <r> is required to form a rhyme with föst-. Other mss (Vb, 41 8°ˣ and 705ˣ) have the adj. þystur ‘thirsty’ and the 3rd pers. sg. of the pres. indic. of the verb ‘to be’, er, immediately afterwards, but omit Bb’s er in er fölr af föstum, giving the l. Þystr er hann og fölr af föstu ‘he is thirsty and pale from fasting’ (so Skj B and Skald).