At-Talaaq 65:2

Then when they have approached the end of their waiting period, either retain them honorably or part with them honorably[3]. Call two just men from among yourselves as witnesses, and give true testimony for the sake of Allah. This is an exhortation for those who believe in Allah and the Last Day. Whoever fears Allah, He will make a way out for him[4],

[3] A husband may return to his wife after the first or the second divorce (revocable divorce) or at the end of her waiting period with dignity. If he divorces her a third time, the marriage is terminated at the end of her third waiting period (Irrevocable divorce). The wife will have to marry and get divorced by another man before she can remarry her ex-husband. See 2:230.
[4] i.e., relief from distress and inconvenience.

And when they have [nearly] fulfilled their term, either retain them according to acceptable terms or part with them according to acceptable terms. And bring to witness two just men from among you and establish the testimony for [the acceptance of] Allāh. That is instructed to whoever should believe in Allāh and the Last Day. And whoever fears Allāh - He will make for him a way out[1699]

[1699] i.e., relief from distress.

2. Then when they are about to attain their term appointed, either take them back in a good manner or part with them in a good manner. And take as witness two just persons from among you (Muslims). And establish the testimony for Allâh. That will be an admonition given to him who believes in Allâh and the Last Day. And whosoever fears Allâh and keeps his duty to Him, He will make a way for him to get out (from every difficulty).

Then, when they have reached their term, take them back in kindness or part from them in kindness, and call to witness two just men among you, and keep your testimony upright for Allah. Whoso believeth in Allah and the Last Day is exhorted to act thus. And whosoever keepeth his duty to Allah, Allah will appoint a way out for him,