1 Samuel 25:40

When the servants of David were come to Abigail. — The time that had elapsed between the death of Nabal and this mission of David to Abigail is not specified. The legal time of mourning was fixed at only seven days, but a very considerable period may have elapsed in this case. S. Ambrose allegorises here, as is usual in Patristic expositions, and compares the espousals of Abigail to David after Nabar’s death to the union of the Church (i.e., the Gentile world) to Christ after the cessation of its connection with heathenism. — S. Ambrose, Ep. 31 (quoted in Words worth).