Anas bin Malik reported,

Haritha was struck down on the day of Badr, while still a young boy. His mother came to the Prophet ﷺ and said, "Messenger of Allah, you know how dear Haritha was to me. If he is in Paradise, I will be patient and seek my reward with 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? They are many gardens, and he is in the Garden of Firdaws."

Azami 12699

Sahih

عن أنس قال

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، أو جنة واحدة هي؟ إنها جنان كثيرة، وإنه في جنة الفردوس.

الأعظمي 12699صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Tafsir of the great Quran
Chapter
Virtues of Surah Baqarah
Section
His saying, "We will surely inform those who disbelieved of what they did, and We will surely make them taste a harsh punishment"
Numbering
Jami al-Kamil 12699 (2nd edition)
Azami 12699