"He is none of us" ???
Ibn Mas`ud (May Allah be pleased with him) said: The Messenger of Allah (sallallaahu ’alayhi wa sallam) said,
"He who (on befalling a calamity) slaps his cheeks, tears his clothes and follows the ways and traditions of the Days of Ignorance is none of us.
"[Al-Bukhari and Muslim]
Commentary: "He is none of us" here signifies that he is not following the ways of Muslims. "The ways and traditions of the Days of Ignorance'' means here wailing, i.e., `Alas! my lion, my moon, my support, one whose death has rendered his children orphan etc., etc.' This is a grave sin and there is a stern warning that one who does it, is in danger of losing his Faith because by doing so one, in fact, expresses resentment against Allah's Command.
Ref.: Imam Al-Nawawi's Riyad-us-Saliheen # 1658.
Asma the sister of Aishah, was advised by the Prophet ﷺ to give charity so that Allah would give more of His bounty.
She said: "The Messenger of Allah ﷺ said to me:
'Do not withhold charity lest Allah would withhold rizq (provision) from you."
Sahih Al Bukhari, Vol 3, Book 47, No. 764