فَلَمَّآ أَسۡلَمَا وَتَلَّهُۥ لِلۡجَبِينِ
Then, when they had both submitted themselves (to the Will of Allah), and he had laid him prostrate on his forehead (or on the side of his forehead for slaughtering)
Author: Muhammad Taqi Ud Din Al Hilali And Muhammad Muhsin Khan