Answer: 1. Modesty towards Allah by not disobeying Him

2. Modesty towards people by refraining from foul and indecent speech and from uncovering the ‘Awrah

The Prophet (may Allah's peace and blessings be upon him) said: "Faith has over seventy branches – or over sixty branches – the best of which is saying: There is no god but Allah; and the least of which is the removal of harmful objects from the way; and modesty is a branch of faith." [Narrated by Muslim]