Translation of the verse 91 from Surah An-Nahl : Number of verses 128 - - page 277 - Part 14.
And fulfill the Covenant of Allah (Bai'a: pledge for Islam) when you have covenanted, and break not the oaths after you have confirmed them, and indeed you have appointed Allah your surety. Verily! Allah knows what you do.
And fulfill the covenant of Allah when you have taken it, [O believers], and do not break oaths after their confirmation while you have made Allah, over you, a witness. Indeed, Allah knows what you do.
(16:91) Fulfil your covenant with Allah when you have made a Covenant with Him, and do not break your oaths after they have been confirmed and you have made Allah your witness. Allah is fully aware of all your actions.