Then, when they had both submitted themselves (to the Will of Allah),

﴿فَلَمَّآ أَسۡلَمَا وَتَلَّهُۥ لِلۡجَبِينِ ﴾
[الصَّافَات: 103]

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)

﴿فلما أسلما وتله للجبين﴾ [الصَّافَات: 103]

Al Bilal Muhammad Et Al
So when they both submitted their wills, and he laid him prostrate on his forehead

Ali Bakhtiari Nejad
So when they both submitted and he (Abraham) put him down on the forehead

Ali Quli Qarai
So when they had both surrendered [to Allah’s will], and he had laid him down on his forehead

Ali Unal
Then when both had submitted to God’s will, and Abraham had laid him down on the side of his forehead

Hamid S Aziz
So when they had both Surrendered (unto Allah in Islam) and he threw him down upon his face

John Medows Rodwell
And when they had surrendered them to the will of God, he laid him down upon his forehead

Literal
So when they (B) submitted/surrounded and he pulled/pushed/followed him to the foreheads

Mir Anees Original
Then, when they both submitted and he (Ibrahim) laid him down on his forehead, (at that moment)

Mir Aneesuddin
Then, when they both submitted and he (Abraham) laid him down on his forehead, (at that moment)