1 Samuel 14:35

Then Saul built an altar to the Lord; it was the first time he had built an altar to the Lord.
BSB · Berean Standard Bible
And Saul built an altar unto the Lord: the same was the first altar that he built unto the Lord.

Note the same…: Heb. that altar he began to build unto the LORD

KJV · King James Version
Saul built an altar to the Lord. This was the first altar that he built to the Lord.
WEB · World English Bible
And Saul built an altar unto Jehovah: the same was the first altar that he built unto Jehovah.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

built
It is probable that Saul converted the great stone, on which the cattle had been slaughtered, into an altar, on which sacrifices were offered, before the people attempted to proceed any further. This we are told was the first he had built. Samuel, as a prophet and priest, had hitherto erected the altars, but Saul seems to have thought he had sufficient authority to erect one himself, without the prophet, as he had once offered sacrifice without him.
1 Samuel 7:9, 17; Judges 21:4; Hosea 8:14; 2 Timothy 3:5