New Revised Standard Version
After he had gone, the servants came. When they saw that the doors of the roof chamber were locked, they thought, “He must be relieving himself in the cool chamber.”

Contemporary English Version
and left. When the king's officials came back and saw that the doors were locked, they said, "The king is probably inside relieving himself."

New American Bible
When Ehud had left and the servants had come, they saw that the doors of the upper room were locked, and thought, “He must be easing himself in the cool chamber.”

Douay-Rheims Bible
Went out by a postern door. And the king's servants going in, saw the doors of the parlour shut, and they said: Perhaps he is easing nature in his summer parlour.

Went out by a postern door. And the king's servants going in, saw the doors of the parlour shut, and they said: Perhaps he is easing nature in his summer parlour.

covereth or, doeth his easement

1 Samuel 24:3 And he came to the sheepcotes which were in his way. And there was a cave, into which Saul went, to ease nature: now David and his men lay hid in the inner part of the cave.