Malik bin Sasaa reported,

The Messenger of Allah ﷺ told them about the night he was taken on the night journey, until he reached the fifth heaven, and there was Harun. He said, "This is Harun, so greet him." So I greeted him, and he returned the greeting, then said, "Welcome to the righteous brother and the righteous prophet."Thabit and Abbad bin Abu Ali corroborated this from Anas from the Prophet ﷺ.

Bukhari 3393

Sahih

حدثنا هدبة بن خالد حدثنا همام حدثنا قتادة عن أنس بن مالك

عن مالك بن صعصعة

أن رسول الله ﷺ حدثهم عن ليلة أسري به حتى أتى السماء الخامسة فإذا هارون قال هذا هارون فسلم عليه فسلمت عليه فرد ثم قال مرحبا بالأخ الصالح والنبي الصالح تابعه ثابت وعباد بن أبي علي عن أنس عن النبي ﷺ

البخاري 3393صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Hadiths of the prophets
Chapter
Saying of Allah عز وجل, "And has there come to you the story of Musa, when he saw a fire" to His saying, "in the sacred valley of Tuwa"
Numbering
Darussalam 3393
Bukhari 3393