Sirach 48:21

21 He smote the host of the Assyrians, and his angel destroyed them.

Sirach 48:21 In-Context

19 Then trembled their hearts and hands, and they were in pain, as women in travail.
20 But they called upon the Lord which is merciful, and stretched out their hands toward him: and immediately the Holy One heard them out of heaven, and delivered them by the ministry of Esay.
21 He smote the host of the Assyrians, and his angel destroyed them.
22 For Ezekias had done the thing that pleased the Lord, and was strong in the ways of David his father, as Esay the prophet, who was great and faithful in his vision, had commanded him.
23 In his time the sun went backward, and he lengthened the king's life.

The Brenton translation of the Septuagint is in the public domain.