Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "sárian." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 694.
;p. ode. I.to feel pain for, feel sorry for :-- Heó is má tó sárianne magis dolendum, Bd. 1, 27; S. 496, 40. II.to be sore (v. sár; adj.), (1) of physical pain :-- Hé (the disease) wundaþ and sió wund sáraþ the wound gets painful, Past. 11; Swt. 71, 20. Ða liran ðara lendena sáriaþ, Lchdm. ii. 216, 24. (2) of mental pain, to grieve, be sad :-- Ic sárige on mínum wítum I grow sad in my punishments, Nar. 43, 7. Wé sáriaþ ealle, forðon þe wé seóþ ðínne líchaman beón cwylmed, 42, 2.