Surah Maryam 19:53
ﱉ ﱊ ﱋ ﱌ ﱍ ﱎ ﱏ
And We gave him out of Our mercy his brother Aaron as a prophet.
ﱉ ﱊ ﱋ ﱌ ﱍ ﱎ ﱏ
And We gave him out of Our mercy his brother Aaron as a prophet.
Tafsir
Verse range: 19:53
{And We bestowed upon him out of Our mercy} Meaning: Because of Our mercy toward him and Our compassion for him, We bestowed upon him Aaron. Or, it means "some of Our mercy," as in the verse: {And We bestowed upon them out of Our mercy}.
In this interpretation, {his brother} is an appositive (badal), and {Aaron} is an explanatory noun (ʿaṭf bayān), similar to your saying: "I saw a man, your brother, Zayd."
Aaron was older than Moses, so the "bestowal" refers to his support and assistance. This is reported from Ibn Abbas (may Allah be pleased with him).