Hadith: Perform Jihad against the polytheists with your riches, souls, and tongues

عن أنس رضي الله عنه أن النبي صلى الله عليه وسلم قال: «جَاهِدُوا المشركين بأموالكم وأنفسكم وألسنتكم».
[صحيح] - [رواه أبوداود والدارمي والنسائي وأحمد]

Anas (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Perform Jihad against the polytheists with your riches, souls, and tongues."
Sahih/Authentic. - [An-Nasaa’i]

Explanation

The Prophet (may Allah's peace and blessings be upon him) commanded the believers to perform Jihad under the authority of their leader and under a unified Muslim banner. This Jihad must be performed solely to make the Word of Allah superior, and not for worldly gains. Jihad is to be performed: 1. Financially: by spending money on buying weapons and training warriors, etc. 2. In person: by engaging directly in fighting for those who are capable and qualified to do so. This is the fundamental element of Jihad. In this respect, Allah, the Almighty, says: {And make Jihad with your wealth and your yourselves.} [Sūrat At-Tawbah: 41] 3. Verbally: by calling to, spreading, and defending the religion of Allah; by debating with and refuting the allegations of the atheists; and by preaching Islam using all possible means and media to prove the truth to those who are obstinate. Words may also be used in subduing the enemy: {Nor do they inflict upon an enemy any infliction but that is registered for them as a righteous deed} [Sūrat At-Tawbah: 120]. In this respect, the speeches and poetry that motivate the believers to perform Jihad can be used, for the Prophet (may Allah's peace and blessings be upon him) said: "Lampoon (in poetry) the Quraysh, for this is harsher on them than the shooting of arrows." [Muslim]