New Revised Standard Version
When they were at the large stone that is in Gibeon, Amasa came to meet them. Now Joab was wearing a soldier’s garment and over it was a belt with a sword in its sheath fastened at his waist; as he went forward it fell out.

Contemporary English Version
They had gone as far as the big rock at Gibeon when Amasa caught up with them. Joab had a dagger strapped around his waist over his military uniform, but it fell out as he started toward Amasa.

New American Bible
They were at the great stone in Gibeon when Amasa met them. Now Joab had a belt over his tunic, from which was slung a sword in its sheath at his thigh; the sword would slide out downwards.

Douay-Rheims Bible
And when they were at the great stone which is in Gabaon, Amasa coming met them. And Joab had on a close coat of equal length with his habit, and over it was girded with a sword hanging down to his flank, in a scabbard, made in such manner as to come out with the least motion and strike.

And when they were at the great stone which is in Gabaon, Amasa coming met them. And Joab had on a close coat of equal length with his habit, and over it was girded with a sword hanging down to his flank, in a scabbard, made in such manner as to come out with the least motion and strike.

in Gibeon

2 Samuel 2:13 And Joab the son of Sarvia, and the servants of David went out, and met them by the pool of Gabaon. And when they were come together, they sat down over against one another: the one on the one side of the pool, and the other on the other side.

2 Samuel 3:30 So Joab and Abisai his brother slew Abner, because he had killed their brother Asael at Gabaon in the battle.

Amasa

2 Samuel 20:4,5 And the king said to Amasa: Assemble to me all the men of Juda against the third day, and be thou here present. . . .