Those who believed (in the Oneness of Allah - Islamic Monotheism), and

﴿ٱلَّذِينَ ءَامَنُواْ وَكَانُواْ يَتَّقُونَ ﴾
[يُونس: 63]

Those who believed (in the Oneness of Allah - Islamic Monotheism), and used to fear Allah much (by abstaining from evil deeds and sins and by doing righteous deeds)

﴿الذين آمنوا وكانوا يتقون﴾ [يُونس: 63]

Al Bilal Muhammad Et Al
Those who believe and guard against wrong

Ali Bakhtiari Nejad
those who believed and were controlling themselves

Ali Quli Qarai
—those who have faith and are Godwary

Ali Unal
They are those who believe and keep from disobedience to God in reverence for Him and piety

Hamid S Aziz
They who believe and who fear (do their duty to Allah)

John Medows Rodwell
They who believe and fear God

Literal
Those who believed and were fearing and obeying

Mir Anees Original
Those who believe and guard (against evil)

Mir Aneesuddin
Those who believe and guard (against evil)