Holding in urine and retaining it when relieving oneself is not feasible
Machine translationRead the Arabic original
The questioner:
If he feels a slight need for it, he can hold it in for a longer period without any harm.
The Shaykh:
There is no harm, except that it may occur during prayer; one should not enter the prayer while in this state. It involves one of the two excretory organs. The Prophet (peace and blessings be upon him) forbade that. One should not enter the prayer while struggling with one of the two excretions, urine or feces. However, if this is outside of prayer and does not harm him, and this matter does not cause harm, then there is no harm in it. He knows his own condition best. A person may be in a place where it is not feasible to relieve oneself or urinate, so he holds it in for a short time until it becomes feasible. Yes.
If he feels a slight need for it, he can hold it in for a longer period without any harm.
The Shaykh:
There is no harm, except that it may occur during prayer; one should not enter the prayer while in this state. It involves one of the two excretory organs. The Prophet (peace and blessings be upon him) forbade that. One should not enter the prayer while struggling with one of the two excretions, urine or feces. However, if this is outside of prayer and does not harm him, and this matter does not cause harm, then there is no harm in it. He knows his own condition best. A person may be in a place where it is not feasible to relieve oneself or urinate, so he holds it in for a short time until it becomes feasible. Yes.
Source
الفوزان -أشرطة- شرح زاد المستقنع مع الأسئلة - 004-باب الاستنجاء وآدابه - 26-6-20 هـ (2) — archive.org (53:42)
The Arabic text is a machine transcription of the audio recording.