Hadithcore
Al-Adab Al-Mufrad, 521
sahih· Al-Albani

Abu Qilaba reported from Abu'l-Ash'ath as-San'ani that Abu Asma' said, "Whoever visits his brother is in a tent of the Garden." I (the transmitter) asked Abu Qilaba, "What is the tent of the Garden?" "Its fruits," he replied. I said to Abu Qilaba, "From whom did Asma' transmit?" "From Thawban from the Messenger of Allah, (ﷺ)," he replied.

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، قَالَ‏:‏ حَدَّثَنَا عَبْدُ الْوَاحِدِ، قَالَ‏:‏ حَدَّثَنَا عَاصِمٌ، عَنْ أَبِي قِلاَبَةَ، عَنْ أَبِي الأَشْعَثِ الصَّنْعَانِيِّ، عَنْ أَبِي أَسْمَاءَ قَالَ‏:‏ مَنْ عَادَ أَخَاهُ كَانَ فِي خُرْفَةِ الْجَنَّةِ، قُلْتُ لأَبِي قِلاَبَةَ‏:‏ مَا خُرْفَةُ الْجَنَّةِ‏؟‏ قَالَ‏:‏ جَنَاهَا، قُلْتُ لأَبِي قِلاَبَةَ‏:‏ عَنْ مَنْ حَدَّثَهُ أَبُو أَسْمَاءَ‏؟‏ قَالَ‏:‏ عَنْ ثَوْبَانَ، عَنْ رَسُولِ اللهِ صلى الله عليه وسلم‏ نحوه.

References2 variants
In-Book Reference
Book 29, Hadith 31
English Reference
Book 29, Hadith 521