It is Obligatory Not to Pay Attention to Those who Ridicule and Mock

Question :

Some people claim to be Muslims, yet when they see someone who follows the Messenger of Allah someone who shortens the length of his garment, or grows his beard, or spends time in the Masjid they say that this person is following a fictitious set of rules or they may say something else that angers Allah Almighty. Please advise them, and may Allah Almighty reward you.

Answer:

It is the responsibility of every male and female Muslim to follow the commands of Allah and of His Messenger, to avoid what they have forbidden, and to advise others to the same path, without paying any attention to what those who ridicule and mock say. In this regard, Allah Almighty says:
"And obey Allah and the Messenger that you may obtain mercy."

He also said:
"Say: "Obey Allah and obey the Messenger, but if you turn away, he is only responsible for the duty placed on him, and you for that placed on you. If you obey him, you shall be on the right guidance. The Messenger's ﷺ duty is only to convey in a clear way."

And in Surat An-Nisa':
"These are the limits (set by) Allah, and whosoever obeys Allah and His Messenger will be admitted to Gardens under which rivers flow, to abide therein, and that will be the great success.

And whosoever disobeys Allah and His Messenger, and transgresses His limits, He will cast him into the Fire, to abide therein; and he shall have a disgraceful torment."

The Prophet ﷺ said:
"My whole nation will enter Paradise, except he who refuses."

He was asked, "O Messenger of Allah, and who refuses?" He said:
"Whoever obeys me enters Paradise. Whoever disobeys me refuses."

Obeying Allah and His Messenger means praying the five daily prayers on time, and for men, praying them in congrega- tion in the Masjid. Obeying Allah and His Messenger means paying the Zakah, fasting Ramadan, performing the pilgrimage to the House (in Makkah) if one is able, obeying one's parents, keeping good relations with relatives, not using the tongue or any other body part to perform what is unlawful. Obeying Allâh and His Messenger ﷺ emeans mutual cooperation and promotion of what is good ordering others to good and forbidding them from evil. Obeying Allah and His Messenger means, for men specifically, to trim the moustache, to allow the beard to grow, and not to allow one's garment to fall below the ankles, for the Messenger of Allah ﷺ said:
"Be different from the polytheists; grow abundantly the beards and cut the moustaches short."

He ﷺ also said:
"Whatever of the Izar is below the ankles, then it is in the Fire."

All other forms of clothing pants, long shirts, robes, etc. - fall under the same ruling. The Messenger of Allah ﷺ also said:
"There are three people that Allah will not speak to on the Day of Judgement, will not look at them, will not purify them; and for them is a painful punishment: one who lets his garment hang below his ankles, the Mannan and the Munffiq who does his business with false oaths."
And Allâh is the Granter of success.