[1] þar frák ... verjask vápnum ‘there I have heard ... defended themselves with weapons’: Finnur Jónsson (Skj B and LP: 1. verja) understands the dat. vápnum as ‘against [enemy] weapons’, but Kock (NN §3256) points out that in constructions of verjask + dat., a dat. referring to an opponent is a pure dat. meaning ‘against’ whereas a dat. referring to defensive weapons, as here, is instr., meaning ‘with’.