אֲלַףʼălaph

1,000 (Daniel 5:1; Daniel 7:10)

Pronunciation: al-af' · Hebrew/Aramaic (Old Testament) · H506

Same root

אֶלֶףʼeleph · H505hence (the ox's head being the first letter of the alphabet, and this eventually used as a numeral) a thousand

Where it appears

Appears 4 times in the Bible.

Daniel 5:1 Many years later King Belshazzar gave a great feast for 1,000 of his nobles, and he drank wine with them.
Daniel 7:10 and a river of fire was pouring out, flowing from his presence. Millions of angels ministered to him; many millions stood to attend him. Then the court began its session, and the books were opened.

See every passage

Daniel 5:1, 7:10

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).