That the Messenger of Allah (ﷺ) said: "Whoever grants respite to an indigent or alleviates it for him, Allah will shade him on the Day of Judgement under His Throne, a Day in which there is no shade except His shade."

There are narrations on this topic from Abu Al-Yasar, Abu Qatadah, Hudhaifah, Abu Mas'ud, 'Ubadah, and Jabir.

The Hadith if Abu Hurairah is a Hasan Sahih Gharib Hadith from this route.
Jami` at-Tirmidhi Book 14, Hadith 109
← Previous Hadith "Makhrafah Al-'Abdi and I brought linens from Hajar. The Prophet (ﷺ) came to us in bargain with us with some pants. There was someone with me who weighed (the goods) to determine the value. So the the Prophet (ﷺ) said to the one weighing: 'Weigh and add more.'"

There are narrations on this topic from Jabir and Abu Hurairah.

The Hadith of Suwaid is a Hasan Sahih Hadith. The people of knowledge consider it recommended to add more when weighing.

Shu'bah reported this Hadith from Simak, so he said: "From Abu Safwan" and he mentioned the narration.

Jami` at-Tirmidhi Book 14, Hadith 108 Next Hadith → That the Messenger of Allah (ﷺ) said: "A man among those before you was called to reckon and nothing good was found with him. Except that he was a wealthy man so he used to mix with the pople and he would tell his servant to be lenient with the insolvent. So Allah, Mighty and Sublime is He, said: 'We are more worthy of that than him, so be lenient with him.'"

This Hadith is Hasan Sahih. Abu Al-Yasar is Ka'b bin 'Amr.

Jami` at-Tirmidhi Book 14, Hadith 110