Abbad b. Tamim reported from his uncle that a person made a complaint to the Prophet (ﷺ) that he entertained (doubt) as if something had happened to him which had rendered his ablution invalid. He (the Prophet) said:He should not cease (to pray) unless he hears a sound or perceives a smell (of passing wind)
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“Read in the name of your Lord who created.” 96:1
“My Lord, increase me in knowledge.” 20:114
“So remember Me; I will remember you.” 2:152
“Indeed, with hardship comes ease.” 94:6