You should read Deuteronomy 18:9-13:
The Canaanites killed infants childern by burning them. This is the worst sin, to kill life that can't defend itself.
A practice to worship Moloch, Baal(s), and Asherah on the high places (same as in Ezekiel 23:36-39).
Sorcery
Divination
Communicating with the dead.
Deuteronomy contains a restatement of the Torah, or Law, addressed to the 'new generation' who had arisen over the 40 years in the wilderness. The name itself comes from the two Greek words 'deutero' (second) and 'nomos' (Law). As such, the title means 'second Law'. Moses is essentially giving his parting address to the nation before his own death and more importantly before the nation was to enter the promised land. This entry, and the future of the nation is often referred to in the book. In particular Moses is concerned about the future idolatry, and resultant judgment, which he foresaw, and against which he sternly warned the people.
The Bible is very clear on the practice of spiritism, which would include trying to communicate with the dead.The law covenant forbade inquiring of the dead and stated that the practice of spiritism was a capital offense.(Leviticus 19:31) 31 "'Do not turn to the spirit mediums, and do not consult fortune-tellers so as to become unclean by them. I am Jehovah your God.(Leviticus 20:6) 6 "'As for the person who turns to the spirit mediums and the fortune-tellers so as to commit spiritual prostitution with them, I will certainly turn against that person and cut him off from his people.(Deuteronomy 18:9-12) 9 "When you have entered into the land that Jehovah your God is giving you, you must not learn to imitate the detestable practices of those nations. 10 There should not be found in you anyone who makes his son or his daughter pass through the fire, anyone who employs divination, anyone practicing magic, anyone who looks for omens, a sorcerer, 11 anyone binding others with a spell, anyone who consults a spirit medium or a fortune-teller, or anyone who inquires of the dead. 12 For whoever does these things is detestable to Jehovah, and on account of these detestable practices Jehovah your God is driving them away from before you.And in the time of early Christianity, it was reinforced with the statement that those who practiced spiritism "will not inherit God's Kingdom"(Galatians 5:19-21) 19 Now the works of the flesh are plainly seen, and they are sexual immorality, uncleanness, brazen conduct, 20 idolatry, spiritism, hostility, strife, jealousy, fits of anger, dissensions, divisions, sects, 21 envy, drunkenness, wild parties, and things like these. I am forewarning you about these things, the same way I already warned you, that those who practice such things will not inherit God's Kingdom.(Revelation 21:8) 8 But as for the cowards and those without faith and those who are disgusting in their filth and murderers and the sexually immoral and those practicing spiritism and idolaters and all the liars, their portion will be in the lake that burns with fire and sulfur. This means the second death."
The prophet who warned Queequeg and Ishmael about sailing on the Pequod was Elijah. He appears in Herman Melville's novel "Moby-Dick" and his warning sets an ominous tone for the characters' journey.
Isaiah warned the proud woman of Jerusalem that God's judgment would be the destruction of her beauty and privilege, leading to humiliation and loss of status. This judgment was a consequence of her arrogance and lack of compassion towards the needy and oppressed.
Amos criticizes the worship that is hypocritical, focused only on outward acts rather than inner faith, and that is disconnected from justice and righteousness in society. He rebukes those who participate in religious rituals while neglecting the needs of the marginalized and oppressed.
All prophets warned man against sin.
Winston Churchill warned against appeasement while Neville Chamberlain was applauded for his appeared diplomacy.
Washington after he left office Warned about permanent alliances in his farewell address
Washington warned against permanent foreign alliances and the formation of political factions in his Farewell Address.
George Washington
The Lorax wanted to protect the trees and the environment from destruction by the Once-ler's business practices in the Dr. Seuss book "The Lorax." He spoke for the trees and warned against the consequences of deforestation.
Cassius
George Washington believed that the American governments primary concentration stay on American interest. He warned the American people against permanent alliance, but he also advised for good relationships with other countries in which America could gain friendship and commerce. He warned against domestic affairs and interfering with European affairs. He even warned against Washington's public political address warned against foreign influence in domestic affairs and American meddling in European affairs. He warned America against a hostile partisanship. He was also the one to establish the presidency reign of two terms.
George Washington believed that the American governments primary concentration stay on American interest. He warned the American people against permanent alliance, but he also advised for good relationships with other countries in which America could gain friendship and commerce. He warned against domestic affairs and interfering with European affairs. He even warned against Washington's public political address warned against foreign influence in domestic affairs and American meddling in European affairs. He warned America against a hostile partisanship. He was also the one to establish the presidency reign of two terms.
he warned not become involved with other countries
The Monroe Doctrine
To use caution is to be careful. to get a cation is to be warned against doing what you are doing.