Hæften

According to the Old English Dictionary:

e;

hæften

f. Captivity, custody :-- Ða betste of ðes eorles híréde innan ánan fæstene gewann and on hæftene gedyde he took the best of the earl's household within a fortress and placed them in custody, Chr. 1095; Erl. 231, 29. hæften