References for some Ahaadith

Q: Please answer and give me the references:

  1. The Messenger of Allah (sallallahu alaiyhi wasalam) said : among good deeds for which a believer will continue to receive the  reward after his death, the knowledge which he has taught and spread, a good son he left behind or a copy of the Quran he left as an inheritance, or a mosque that he built a House which he built for the traveler or a river he caused to flow, or a sadaqah that he gave of his property when he was alive and well, why he will continue to receive the reward after his death. (Ibn Majah and Baihaqi)
  2. The Messenger of Allah slaughtered sheeps during his pilgrimage and did intend for himself and all those (living, deceased and upcoming) that bring the faith on his prophecy. (Saheeh Boukhari)
  3. In a hadith, Rasoulullah (Sallallahu Alayhi Wasallam) asked the sahabah : who is the greatest mouflis…

Reciting the Qur'an together with adhering to all the rules of recitation and tajweed

Q: My question is about the speed of the recitation of the Qur'an during tarawih.

The accent is put on reciting the required amount of verses per night, but it seems nobody cares about  tajweed. In fact for some Asian people, the quickest you recite, the more great you are. That makes asians qurra' and 'ulama look terrible in front of arab scholars, who might not recite the whole qur'an but their recitations are alright.

With Ramadhan coming in summer season and with short nights, these recitations will become the norm. And finally there exists this trend of reciting the Qur'an in one night, where tajwid rules are literally butchered, some 'ulama say it is haram to do so, what do you say on this?

Reciting Sallallahu Alayhi Wasallam instead of the durood in Salaah

Q: If we are short in time when praying salat, instead of reading the whole "Allahumma salli `ala muhammadin wa.." in Durood, can we suffice with just "Salla allahu alayhi wa sallam", will the sunna be fulfilled by this? Also, is it ok to just mention the Prophet as a pronoun or should he be mentioned by name i.e. "Salla allahu ala Muhammedin wa sallam"?

Wiping urine from the skin

Q: Please can you advise me with regards to whether when urine falls on my skin and I wipe my skin and ensure it is dry. If I subsequently perspire does my clothes as well as all the places I sit on (bed, chair etc) become napaak and do I have to clean these surfaces by wiping them thrice?