Q: Is it permissible to work in banks and also what is the Hadith regarding a person missing three Jumahs in a row?

It should be understood that taking and giving interest is counted as one of the gravest and heinous sins in Islam.

The Holy Prophet (saw) has said:
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“The Holy Prophet (saw) has cursed the person who takes interest, who gives interest, who writes it and who witnesses it.”

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“To take one dirham of interest knowingly is worse than committing adultery 36 times.”
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“A person who involves himself in usury will be afflicted with 70 kinds of sins. The lightest in comparison with others is committing adultery with your own mother.”

In the Holy Quran Allah has said:

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“O’ you who believe! Be afraid of Allah and give up what remains of riba if you are believers. And if you do not do it, then be ready for war with Allah and his Prophets.”
(Cha.2 Verse 278)

It is clearly evident from the above mentioned Quranic verses and Hadith that dealing with and acquiring interest is haraam in Islam.

In regards to your question working in banks or insurance companies will not be permissible as they deal and acquire interest. Furthermore, Mufti Rashid Saheb in Ahsanul Fatawa has called such places as oppressors as they have acquired the interest money oppressively, therefore, working there will not be permissible.
(Ahsanul Fatawa p.90 v.8)

With regards to missing Jumu’ah:

Abu Ja’d al-Dhamri (Allah be pleased with him) narrates that the Messenger of Allah (saw) said: “Whosoever misses three Jumu’ah prayers by taking the matter lightly, Allah will seal his heart.” (Sunan Abu Dawud, Sunan Tirmidhi, Sunan Nasa’i, Sunan Ibn Majah)

Mohammed Tosir Miah
Darul Ifta Birmingham