Troops searching homes near where Yahya Sinwar was killed found letters he sent and received, including correspondence with his 10-year-old son, in which the slain terror chief tried to imbue the child with a hatred for Israel, Hebrew media reported Friday.

According to Channel 12, Sinwar wrote his son several sermons excoriating Israel. The boy, in turn, reportedly sent his father drawings of dead Israeli soldiers, and at one point was said to ask when the war would end.

Sinwar was the architect of the onslaught that sparked the war in Gaza on October 7, 2023, when thousands of Hamas-led terrorists stormed southern Israel to kill nearly 1,200 people and take 251 hostages.

He was killed Wednesday in a chance encounter with Israeli troops operating in southern Gaza’s Rafah, where he had apparently fled from Khan Younis.

On his person, troops were said to find other correspondence containing highly valuable intelligence, as well as NIS 40,000 ($10,760) in cash and a fake ID.

Sinwar had served 23 years in Israeli prison for the murder of Palestinians whom he suspected of cooperating with Israel. In October 2011, he was one of over 1,000 terrorists Israel released in return for Gilad Shalit, a soldier Hamas kidnapped in 2006.

A month after his release, Sinwar, then 49, married Samar Muhammad Abu Zamar, then 31. They had three children, whose respective names, ages and fates are unclear.