أحسن الله إليكم أستاذنا Is one sinful for letting the mustache hair grow over the upper lip? And if one intends to offer a sacrifice and refrains from cutting hair and anything from the skin, but the mustache grows over the upper lip—does he incur sin? جزاك الله خيرا

Ustadh AbdulAziz al-Haqqan
You should trim your mustache before may Allah reward you so that this doesn't happen.