Matthew Poole and continuators on Deuteronomy 32:18

18 Of the Rock that begat thee thou art unmindful, and hast forgotten God that formed thee.

(i. e.) Of God, one of whose titles this is, above ver. 4. Isa. 44. 8. or of Christ, who is called the rock, 1 Cor. 10. 4. whom the Israelites are said to have tempted, there ver. 9.

(i. e.) Who hath adopted you to be his people, and hath shewed as much care and kindness to you, as if he had begotten you.