At least 15 children are among the 43 killed in violence in Gaza because of the ceasefire agreement.
Fears of another war rose when Israel launched an offensive against Islamic Jihad leaders in Palestine on Friday.
Palestinian targets came under artillery fire over the weekend, with militants firing back rockets.
Gaza officials said 43 Palestinians were killed, nearly half of them civilians, and hundreds more injured.
However, as Israeli and Palestinian Islamic jihadists have agreed to a truce, it is hoped that further tragedy will be averted for now.
It will take effect at 11:30 pm local time (8:30 pm GMT), said a Palestinian official familiar with the Islamic Jihad and ceasefire efforts.
The office of Israeli Prime Minister Yair Lapid confirmed a ceasefire brokered by Egypt on Sunday.
The fighting marks the biggest flare-up in more than a year in the Gaza Strip.
Hamas, which controls the Strip, fought his 11-day war with Israel in May 2021.
This group has resisted intervention in the current conflict. Did it.
This is likely due to the impact of retaliation on poorer areas of .
Concerns over striking an economic deal with Israel, including Israeli work permits for thousands of Gaza residents, are also believed to be a factor.
Israel on Friday claimed to have launched a "preemptive" operation ahead of Islamic Jihad attacks in response to the arrest of senior member Bassam al-Saadi.
It began with Friday's strike that assassinated his Tayseer Jabari, a senior Islamic Jihad commander.
His Khaled Mansour, a prominent leader of the same group, was killed the next day in an airstrike on his apartment in the Rafah refugee camp in southern Gaza.
The missile destroyed his three-story building and caused extensive damage to nearby homes.
Mansur's funeral was held in the Gaza Strip on Sunday afternoon.
While harrowing pictures of Palestinians mourning the dead have been shown, many Israelis have taken refuge in shelters.
There have been four of her wars and many others between Israel and Palestine in the last 15 years.
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