Is praying in slippers a recommended practice?

Question:
Is praying in slippers called a recommended practice or permissible?

Answer:
It is a recommended practice, a mustahabb. The Prophet (peace and blessings be upon him) said: "Oppose them" , and he used to pray in his slippers except in rare cases where he would take them off to indicate that it is permissible, to show that it is not obligatory. Therefore, he usually prayed in his slippers, but at times he would take them off and pray barefoot, (peace and blessings be upon him), to indicate that it is permissible and not obligatory.
However, now that mosques are carpeted, people may become lax; because most people do not pay attention to their slippers when entering the mosque, they do not care, so they may bring in dirt, mud, or other filth, thereby soiling the carpets of the people and making their place of prostration dirty. So if one places them in a place at the mosque door, or in another place, so as not to harm the people, then this is good, if Allah wills, not out of disdain for the Sunnah, but because of what is known about the general public, and the fact that they usually do not care about their slippers.