Tafsir of Maryam 19:52

وناديناه من جانب الطور

And We called him from the side of the Tur. means Mount.

اﻻيمن

right. It was on the right side of Musa when he went seeking a burning wood from that fire. He saw its glow in the distance, so he set out towards it and found it on the right side of the mountain from his direction, at the edge of the valley that he was in. This is when Allah, the Exalted, spoke to him and called out to him.

وقربناه نجيا

and made him draw near to Us for a talk with him. Allah summoned him to come near and He conversed Ayah with him. Concerning His statement,

ووهبنا له من رحمتنا أخاه هارون نبيا