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dagena
of days; dierum :-- Him bebeád seofon dagena fæsten enjoined them a fast of seven days, Homl. Th. i. 434, 21: Exon. 31 a; Th. 97, 8; Cri. 1587: Menol. Fox 128; Men. 64; gen. pl. of daga.
Cite the scanned version of the original dicionary like this:
Bosworth, Joseph. "dagena." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth. Ed. Thomas Northcote Toller. Oxford: Clarendon Press, 1898. 195.