Hadithcore
Riyad as-Salihin, 255

Abu Hurairah (May Allah be pleased with him) reported:

Messenger of Allah (ﷺ) said, "On the Day of Resurrection, there will be brought forth a bulky person (person of noteworthy status) whose value to Allah will be less than that of the wing of a mosquito". <b>[Al-Bukhari and Muslim]</b>.

وعن أبي هريرة رضي الله عنه عن رسول الله صلى الله عليه وسلم قال‏:‏ ‏

‏ إنه ليأتي الرجل السمين العظيم يوم القيامة لا يزن عند الله جناح بعوضة‏

‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏‏.‏

References1 variant
In-Book Reference
Introduction, Hadith 255
Sharh · explanationclick to expand
<b>Guidance from the Hadith:</b><br> 1) The Hadith establishes that weighing will take place on the Day of Judgment; it will be entirely just and involves no injustice.<br> 2) Warning against being focused on physical comfort alone, while everyone is obligated to take care of providing his heart with knowledge and faith which are the source of its comfort. In fact, when the heart finds comfort, the body finds it as well.<br> Note:<br> The reason this Hadith is included under the Chapter on "Merit of the Weak, Poor, and Humble Muslims" is that obesity mostly results from overeating, which is sometimes an indicator of wealthiness and richness, arrogance and insolence, ingratitude to blessings and forgetting about the weak Muslims.<br> <br> <b>Benefit:</b><br> What is weighed in the balance?<br> The apparent meaning of the Hadith suggests that what is weighed is man, and that he is light or heavy based upon his deeds. Some scholars said that what is weighed is the scrolls of deeds as supported by the Hadith of the Card: “Then a card will be brought out on which is written ‘I bear witness that none has the right to be worshiped but Allah and that Muhammad is His slave and Messenger’ and it will be placed in one pan of the scale...” Others said that what is weighed are the deeds, given the saying of Allah Almighty: {We will place the scales of justice on the Day of Resurrection...} The Prophet (may Allah’s peace and blessings be upon him) said: “Two words weigh heavily in the Scale...”, which means that what will be weighed are the deeds. There is no contradiction, however, between these views, because it is possible that all that is mentioned will be subject to weighing, i.e. the doers, the scrolls, and the deeds; and Allah knows best.