2 Samuel 11:4

4David sent messengers and took her. When she came to him, he lay with her. And 11:4 This casual observation reflects the hypocrisy of David and Bathsheba’s sin. Evidently they both bathed and observed other ritual requirements of the Mosaic Law regarding sexual relations (Lev 15:18 etc.), as if that somehow mitigated the much graver sin of adultery. Both participants in adultery were to be punished by death (Lev 20:10).when she was purified from her uncleanness, she returned to her house.