How sound is the narration that speaks of a group of people entering Paradise on the Day of Judgment without reckoning or scale, and that they use as proof for this God's saying: "Indeed, the patient will be given their reward without reckoning"?

This Hadith (definition) was not narrated in this context. Rather, Ibn Abi al-Dunya in "Al-Sabr wa al-Thawab 'alayh" and Abu Ya'la in "Al-Musnad" narrated a Marfu' Hadith from 'Amr ibn Shu'ayb, from his father, from his grandfather, in which it is mentioned that Allah will gather all creation on the Day of Resurrection, and a caller will proclaim: "Where are the people of virtue (Ahl al-Fadl)?" Then, "Where are the people of patience (Ahl al-Sabr)?" Then, "Where are those who loved each other for the sake of Allah (Al-Mutahabbun fillah)?" Each time, a few people will rise and enter Paradise quickly before the reckoning, and their virtues will be described.

Al-Bayhaqi ruled that the chain of narration for this text is weak and that it is Gharib (unusual). Al-Busiri also deemed it weak due to the presence of Al-'Arzami in its chain. A similar narration was mentioned in Hilyat al-Awliya' by Abu Nu'aym al-Asbahani from Ali ibn al-Husayn, but it is also very weak due to the presence of Zafir ibn Sulayman and Thabit al-Thumali in its chain of narration.

In conclusion, these Ahadith and narrations are weak and not authentic. The established and authentic textual evidence regarding the virtues of patience and those who love each other for the sake of Allah is sufficient.