Translation:

2. This is the Book; in it is guidance sure without doubt to those who fear Allah.

Notes (Tafseer)

26. Taqwa and the verbs and nouns connected with the root, signify: (1) the fear of God which according to the writer of Proverbs (i.7) in the Old Testament is the beginning of Wisdom; (2) restraint, or guarding one's tongue, hand, and heart from evil; (3) hence righteousness, piety good conduct. All these ideas are implied; in the translation, only one or other of these ideas can be indicated according to the context. See also xivii 17; and ixxiv 56, n.5808.