Psalms 81:4

2 Lift up a song, strike the tambourine, play the sweet-sounding harp and lyre.

3 Sound the ram’s horn at the New Moon, and at the full moon on the day of our Feast.

For this is a statute for Israel, an ordinance of the God of Jacob.

5 He ordained it as a testimony for Joseph when he went out over the land of Egypt, where I heard an unfamiliar language:

6 “I relieved his shoulder of the burden; his hands were freed from the basket.

This was said to Israel at a particular time, so it is wise to read it together with the surrounding text. Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
For this is a statute for Israel, an ordinance of the God of Jacob.
KJV
For this was a statute for Israel, and a law of the God of Jacob.
WEB
For it is a statute for Israel, an ordinance of the God of Jacob.
ASV
For it is a statute for Israel, An ordinance of the God of Jacob.
DARBY
For this is a statute for Israel, an ordinance of the God of Jacob;
BLB
For it [is] a statute, O Israel, an ordinance of the God of Jacob.
ÅB
For det er en lov for Israel, en rett for Jakobs Gud.
OTB
For det er en forskrift for Israel,
En befaling fra Jakobs Gud.
B1930
For det er en lov for Israel, en rett for Jakobs Gud.

Study notes (Tyndale)

Original text and word study