Translation:

44. Thou wast not on the Western Side when We decreed the commission to Moses nor wast thou a witness (of those events).

Notes (Tafseer)

3376. The Sinai Peninsula is in the north-west corner of Arabia. But the reference here is, I think, to the western side of the valley of Tuwa. Mount Tur, where Moses received his prophetic commission, is on the western side of the valley.