At-Tawbah 9:45

Innama yasta/thinuka allatheenala yu/minoona billahi walyawmi al-akhiriwartabat quloobuhum fahum fee raybihimyataraddadoon

Only those would ask permission of you who do not believe in Allāh and the Last Day and whose hearts have doubted, and they, in their doubt, are hesitating.

Only those people ask you to be excused who do not believe in Allah and in the Last Day and whose hearts are in doubt; so they are wavering in their doubt.