ISAAC.—Named (1) in our Lord’s genealogy, Matthew 1:2, Luke 3:34; (2) in such collocations as ‘sit down with Abraham and Isaac and Jacob’ (Matthew 8:11), ‘see Abraham and Isaac and Jacob’ (Luke 13:28), ‘the God of Abraham and of Isaac and of Jacob’ (Matthew 22:32, Mark 12:26, Luke 20:37). See Abraham, and Fathers. The sacrifice of Isaac came at an early date to be used by Christian writers as a type of the sacrifice on the cross (cf. e.g. Ep. of Barn. ch. 7). It is just possible that some such thought underlies Romans 8:32 ‘He that spared not his own Son.’