Sahih Muslim

Do not enter but weepingly (the habitations) of these people who had been punished by (Allah), and in case you do not feel inclined to weep, then do not enter (these habitations) that you may not meet the same calamity as had fallen to their lot.

Salim b. 'Abdullah reported that 'Abdullah b. Umar said: We were passing along with Allah's Messenger (ﷺ) through the habitations of Hijr, and Allah's Messenger (ﷺ) said: Do not enter but weepingly the habitations of these persons who committed tyranny among themselves, lest the same calamity should fall upon you as it fell upon them. He then urged his mount to proceed quickly and pass through that valley hurriedly.

Abdullah b. 'Umar reported that the people encamped along with Allah's Messenger (ﷺ) in the valley of Hijr, the habitations of Thamud, and they quenched their thirst from the wells thereof and kneaded the flour with it. Thereupon Allah's Messenger (ﷺ) commanded that the water collected for drinking should be spilt and the flour should be given to the camels and commanded them that the water for drinking should be taken from that well where the she-camel (of Hadrat Salih) used to come.

This hadith has been narrated on the authority of 'Abdullah with the same chain of transmitters but with a slight variation of wording.

One who makes efforts (for earning to be spent) on a widow and the destitute is like a striver in the cause of Allah, and I think he also said: He is like one who constantly stands for prayer and observes fast without breaking it.

One who looks after the orphan whether he is his relative or not, I and he would be together in Paradise like this, and Malik (explained it) with the gesture by drawing his index finger and middle finger close together.

You discuss it very much whereas I have heard Allah's Messenger (ﷺ) as saying: He who builds a mosque-- and the narrator Bukair said: I think he also said: (for) seeking the pleasure of Allah- Allah would build (a similar house for him in Paradise). and in the narration of Harun (the words are):" A house for him in Paradise."