Humayd reported,

I heard Anas say, Haritha was struck down at the battle of Badr while still a young boy. His mother came to the Prophet ﷺ and said, "Messenger of Allah, you know the place Haritha held in my heart. If he is in Paradise, I will bear it patiently and seek my reward from Allah, but if it is otherwise, you will see what I do."He replied, "Woe to you, have you lost your senses? Is it just one Paradise? There are many gardens, and he is in the highest garden of Firdaws."

Azami 10141

Sahih

عن حميد قال

سمعت أنسا يقول: أصيب حارثة يوم بدر وهو غلام، فجاءت أمه إلى النبي ﷺ، فقالت: يا رسول الله، قد عرفت منزلة حارثة مني، فإن يكن في الجنة أصبر وأحتسب، وإن تك الأخرى ترى ما أصنع، فقال: ويحك، أو هبلت، أوجنة واحدة هي؟ إنها جنان كثيرة، وإنه في جنة الفردوس.

الأعظمي 10141صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Virtues of the Companions and reports about them
Chapter
Virtues of individual Companions and their reports
Section
Haritha bin Suraqa bin Harith Ansari is in the garden of Firdaws
Numbering
Jami al-Kamil 10141 (2nd edition)
Azami 10141