What is the ruling on wrapping a newborn in a blanket from Asr (afternoon prayer) until morning, and is there anything in the Qur'an or Sunnah that indicates its ruling?

Swaddling (qimāṭ) is a wide piece of cloth wrapped around an infant. It is not mentioned in the Quran or Sunnah, and it is a matter of custom. The basic ruling concerning it is permissibility, unless its sunnah status is believed or its harm is proven, based on the Prophet's (peace be upon him) saying: "There should be no harm nor reciprocating harm." Ascertaining whether it is harmful or not should be referred to specialized doctors. The medical information concerning it is contradictory, so it is advisable to refrain from it until specialized doctors are consulted.