“Muhammad Kasim marched from Dhalila, and encamped on the banks of the stream of the Jalwali to the east of Brahmanabad. He sent some confidential messengers to Brahmanabad to invite its people to submission and to the Muhammadan faith, to preach to them Islam, to demand the Jizya, or poll-tax, and also to inform them that if they would not submit, they must prepare to fight…
They sent their messengers, and craved for themselves and their families exemption from death and captivity. Muhammad Kasim granted them protection on their faithful promises, but put the soldiers to death, and took all their followers and dependents prisoners. All the captives, up to about thirty years of age, who were able to work, he made slaves, and put a price upon them…
When the plunder and the prisoners of war were brought before Kasim, and enquiries were made about every captive, it was found that Ladi, the wife of Dahir, was in the fort with two daughters of his by his other wives. Veils were put on their faces, and they were delivered to a servant to keep them apart. One-fifth of all the prisoners were chosen and set aside; they were counted as amounting to twenty thousand in number, and the rest were given to the soldiers. Protection was given to the artificers, the merchants, and the common people, and those who had been seized from those classes were all liberated. But he (Kasim) sat on the seat of cruelty, and put all those who had fought to the sword. It is said that about six thousand fighting men were slain, but, according to some, sixteen thousand were killed, and the rest were pardoned.”

Vincent Arthur Smith, The Oxford History of India: From the Earliest Times to the End of 1911 (Clarendon Press, 1920), as quoted in Spencer, Robert (2018). The history of Jihad: From Muhammad to ISIS.
Quotes from the Futuhat-i-Firuz Shahi

The keeper bent his head down. Muhammad Kasim laughed and returned the bracelet to him, and he fixed it again on the idol's arm.'
Alor (Sindh) . The Chach Nama, translated into English by Mirza Kalichbeg Fredunbeg. Delhi Reprint, 1979, pp. 179-80.
Quotes from The Chach Nama

Chachnama, in Lal, K. S. (1994). Muslim slave system in medieval India. New Delhi: Aditya Prakashan. Chapter 3

Ashiqa of Amir Khusru, translated in Elliot and Dowson, History of India as told by its own Historians, Volume III, pp. 545-46.
Context: “Happy Hindustan, the splendour of Religion. where the Law finds perfect honour and security. In learning Dehli can now compete with Bokhara, for IslAm has been made manifest by its kings. The whole country, by means of the sword of our holy warriors, has become like a forest denuded of its thorns by fire. The land has been saturated with the water of the sword, and the vapours of infidelity have been dispersed. The strong men of Hind have been trodden under foot, and all are ready to pay tribute. Islam is triumphant, idolatry is subdued. Had not the law [of Imam Hanifa] granted exemption from death by the payment of poll-tax, the very name of hind, root and branch, would have been extinguished. From Ghazni to the shore of the ocean you see all under the domination of Islam. Cawing crows see no arrows pointed at them; nor is the TarsA (Christian) there, who does not fear (taras) to render the servant equal with Allah; nor the Jew who dares to exalt the Pentateuch to a level with the Kuran; nor the Magh who is delighted with the worship of fire, but of whom the fire complains with its hundred tongues. The four sects of Musulmans are at amity and the very fish are Sunnis.”

Twitter 6 Apr 2019
2019

Qazi Mughisuddin's reply to Sultan Alauddin Khalji. Tarikh-i Firoz Shahi, of Ziauddin Barani in Elliot and Dowson, Vol. III : Elliot and Dowson, History of India as told by its own Historians, 8 Volumes, Allahabad Reprint, 1964. pp. 184, chapter 15 https://archive.org/stream/cu31924073036737#page/n199/mode/2up.Quoted in B.R. Ambedkar, Pakistan or The Partition of India (1946). <!--- Quoted in Jadunath Sarkar, History of Aurangzib, Volume III, Calcutta, 1928, p. 166. Quoted in S.R.Goel, The Calcutta Quran Petition (1999) ISBN 9788185990583 --->
Quotes from Muslim medieval histories
Context: The Sultan then asked, "How are Hindus designated in the law, as payers of tributes or givers of tribute? The Kazi replied, "They are called payers of tribute, and when the revenue officer demands silver from them, they should tender gold. If the officer throws dirt into their mouths, they must without reluctance open their mouths to receive it. By doing so they show their respect for the officer. The due subordination of the zimmi is exhibited in this humble payment and by this throwing of dirt in their mouths. The glorification of Islam is a duty, and contempt of the Religion is vain. God holds them in contempt, for he says, "keep them under in subjection". To keep the Hindus in abasement is especially a religious duty, because they are the most inveterate enemies of the Prophet, and because the Prophet has commanded us to slay them, plunder them, and make them captive, saying, 'Convert them to Islam or kill them, enslave them and spoil their wealth and property.' No doctor but the great doctor (Hanifa), to whose school we belong, has assented to the imposition of the jizya (poll tax) on Hindus. Doctors of other schools allow no other alternative but 'Death or Islam.'"

Riyadh-as-Saliheen by Imam Al-Nawawi, volume 4, hadith number 513
Sunni Hadith