Tiglath-Pileser III was the king of Assyria. He is mentioned in Second Kings, where he (called "Pul", likely comes from his previous name "Pulu") invaded Israel, and received 1000 talents of silver (38 tons). The king of Israel, Menahem, was wicked, so God used Assyria to punish him and Israel for sinning against God.
Again, Tiglath-Pileser came to Israel and took Ijon, Abel Beth Maacah, Janoah, Kedesh, Hazor, Gilead and Galilee, including all the land of Naphtali; he deported their people to Assyria. This was during the reign of Pekah king of Israel.
Another time, Aram was attacking Israel. Ahaz, the king of Israel at the time, requested help from Tiglath-Pileser and said that he (Ahaz) is his (Tiglath-Pileser's) servant and vassal. Tiglath-Pileser did help, after Ahaz sent him a gift of all the silver and gold from the Temple of the LORD and the palace treasury.