Those who are constant in their prayer.
Who always observe their contact prayers (Salat).
who are constant in prayer
Who are constant at their prayer
Those who (are) on their prayers continuing/lasting
devote a portion of their wealth to those who ask for financial help and…
Those who are regular in their prayers
Those who are constant in their Prayer
And are constant in their Prayer
Those persons who remain constant and steadfast in their Prayers
Those who remain constant in their Salat (prayers)