اسْتَغْفِرْهُ

اسْتَغْفِرْهُ is a complete verbal sentence (الجُمْلَةُ الفِعْلِيَّةُ) consisting of a verb, a subject and an object

فِعْلٌ وَمَفْعُوْلٌ بِهِ مَفْعُوْلٌ بِهِ فَاعِلٌ فِعْلٌ
Verbal sentence Object Subject Verb
الجُمْلَةُ الفِعْلِيَّةُ Attached pronoun
اسْتَغْفِرْهُ هُمُسْتَتِرٌ تَقْدِيْرُهُ أَنْتَ اسْتَغْفِرْ
You seek His forgiveness=His+You+Seek forgiveness
Surah/Below is the only verse in the holy Quran containing the verbal sentenceاسْتَغْفِرْهُ
Verse
110-3Then glorify the praises of your Nurturer and seek His forgiveness, truly He is oft returningفَسَبِّحْ بِحَمْدِ رَبِّكَ وَاسْتَغْفِرْهُ إِنَّهُ كَانَ تَوَّابًا