Sandhyavandana Mantra with meaning

1.आपे: पुनन्तु पृथिवीं पृथिवी पूता पुनातु माम् । पुनन्नु ब्राह्मणस्पति-ब्रह्मपूता पुनातु माम् । यदुच्छिष्ट-मभौज्यं यद्वा दुश्वरितं मर्म । सर्वं पुनन्तु मामापर्योऽसतां चे प्रतिग्रहुन् स्वाहाँ ॥ १ ॥
Apah punantu prthivīm pṛthivī pūtā punātu mām. Punantu brahmanaspatirbrahmapută punătu mām. Yadu cchistamabhojyam yadvå duścaritam mamá. Sarvam punantu mämäpo’satăm cả pratigrahagg svāha.
This hymn is chanted by the aspirant to consecrate the water that is used for Achamana, a sacred ritual. It is a prayer to Lord Varuna (representing Water) to cleanse us of all impurities. This prayer is normally chanted at noon.

May this water cleanse my physical body made up of earth, and also my mind. May the water purified by the Supreme, purify me. May I be absolved of the sins of eating impure food, accepting gifts from impure persons or any other such misconduct.

अग्निश्व मा मन्युश्च मन्युपतयश्च मन्यु॒कृतेभ्यः । पापेभ्यों रक्षन्ताम् । यदह्वा पार्षमकार्षम् । मनसा वार्चा हस्ताभ्याम् । पद्भचामुदरेण शिश्ना । अहुस्त-देवलुम्पतु । यत्किञ्चं दुरितं मर्चि । इदमहं माममृतयोनौ । सत्ये ज्योतिषि जुहौमि स्वाहा ॥ २ ॥
Agnisca ma manyuśca manyupatayaśca manyuk Papēbhyo raksantām. Yadahnä papamakársam. Ma vaca hastābhyām. Padbhyāmudarėna śiśna. Ahastad valumpatu. Yatkiñca duritam mayi. Idamahan mamamitayõnau. Satyē jyötişi juhomi svāhā.
This hymn is chanted by the aspirant as part of his evening (Sayam Sandhya) oblations. It is a prayer to Lord Agni (representing Fire) to cleanse us of all impurities including sins that may have been committed by us.

May Agni (the Fire) burn down all anger in me so that I do not commit any sins due to my anger. Let Ahah, the Day efface the sins committed by me in thought, word and deed and through all organs of my body during the day. I offer myself along with all the sins as oblation into the immortal and effulgent Truth(so as to be purified

सूर्यश्च मा मन्युश्च मन्युपतयश्च मन्यु॑कृतेभ्यः । पापेभ्यों रक्षन्ताम् । यद्रात्रिया पाप॑मकारुषम् । मनसा वार्चा हस्ता-भ्याम् । पद्भयामुदरैण शिश्ना । रात्रि-स्तद॑वलुम्पतु यत्किञ्चं दुरितं मयिं । इदमहं माममृतयोनौ । सूर्ये ज्योतिषि जुहोमि स्वाहा ।। ३ ।।
Süryaśca má manyuśca manyupatayaśca manyúkrtëbhyah. Pāpēbhyo rakşantām. Yadrātriyā pāpamakärşam. Manasa vāca hastābhyām. Padbhyāmudarėna śiśnā. Rātrista dávalumpatu. Yatkiñca duritam mayi. Idamaham mamamstayõnau. Süryë jyötişi juhomi svāhā.
May Lord Surya (Sun) burn down all anger in me so that I do not commit any sins due to my anger. May Rathri the Night efface the sins committed by me in thought, word and deed and through all my organs during the night. I offer myself along with all the sins as an oblation into the immortal and supremely luminous Sun(so as to be purified).
Bhagawan Sri Sathya Sai Baba says that true ‘Tapas’ (highest penance) is unity of thought, word and deed. A person who achieves this unity is a ‘Mahatma’ (great one) and one who does not possess the unity of thought, word and deed is a ‘Duratma’ (wicked one).