ealra sancta symbel: the Feast of All Saints, All Saints’ Day. (“ay-al-rah sahnk-tah sum-bell”)
Further information from Kazutomo Karasawa’s The Old English Metrical Calendar (Menologium) (Cambridge, 2015):
And þy ylcan dæge ealra we healdað / sancta symbel þara þe sið oððe ær / worhtan in worulde willan drihtnes.
—The Old English Metrical Calendar (Menologium), lines 199-201
And on the same day, we hold the feast of all saints who ever worked God’s will in the world.
—translation by K. Karasawa