Abu Hurairah (May Allah be pleased with him) reported: The Prophet (ﷺ) said, “A group of people (both men and women) whose hearts will be like the hearts of birds, will enter Jannah”.

[Muslim].

قوله صلى الله عليه وسلم : ( يدخل الجنة أقوام أفئدتهم مثل أفئدة الطير ) قيل : مثلها في رقتها وضعفها ،

An Nawawi said in Sharh Saheeh Muslim:

[Regarding] his statement صلى الله عليه و سلم that a people will enter paradise, their hearts being like the hearts of the bird, then it’s meaning is similar to the heart, specifically its gentleness and softness.

كالحديث الآخر : أهل اليمن أرق قلوبا وأضعف أفئدة

Such as the other narration that the people of Yemen are the most gentle and soft hearted

وقيل : في الخوف والهيبة ، والطير أكثر الحيوان خوفا وفزعا ،

and it is said it is in regards to fear and awe, as the bird is the animal that fears the most

كما قال الله تعالى : إنما يخشى الله من عباده العلماء

As Allah Tala said:

It is only those who have knowledge among His slaves that fear Allah. [35:28]

وكأن المراد قوم غلب عليهم الخوف كما جاء عن جماعات من السلف في شدة خوفهم ، وقيل : المراد متوكلون . والله أعلم .

it is as if the intent is a people whom fear has overcome them as (narrations have) come from a group of the Salaf in regards to their severe fear.

and it is said the intent is it being similar in regards to the Tawakul (putting ones trust in Allah).

End

Also Ash shaykh Al Fawzan mentioned it could mean in regards to envy that it is free from envy and other meanings. Allah knows best

Translated by

Majid Jawed Al-Afghanee
Abu Layl